CLASS I SERVICE INSTRUCTIONS

Transcription

1 SUBJECT: SYNOPSIS OF REVISION: CLASS I SERVICE INSTRUCTIONS No , -249, Rev. I ATA Code PROPELLER - 2-BLADED AND 3-BLADED - PART I, McCAULEY SERVICE BULLETIN NO. 92, CYLINDER ATTACHMENT IMPROVEMENT (ATTACHED); PART 11, McCAULEY SERVICE BULLETIN NO. 93, COUNTERWEIGHT ATTACHMENT IMPROVEMENT (ATTACHED). Part I - Compliance with McCauley Service Bulletin No. 92 (supersedes No. 66) recommended, and Effectivity changed. Part I1 - This portion added to recommend compliance with McCauley Service Bulletin No. 93. EFFECTIVITY: Part I - The following aircraft if equipped with a McCauley 2D34C8, 2A36C23, 3A32C76, or 2A36C82 propeller with the cylinder secured to the hub as described in McCauley Service Bulletin No BEECHCRAFT Musketeer A23-24, serials MA-1 through MA-363; Debonairs/Bonanzas 35-33, 35-A33, 35-B33, 35-C33, E33, and F33, serials CD-1 through CD-1254; Debonairs/Bonanzas 35-C33A, E33A, and F33A, serials CE-1 through CE-345; Bonanzas E33C and F33C, serials CJ-1 through CJ-30; Bonanzas H35, 535, K35, M35, N35, P35, S35, V35, V35TC, V35A, V35A-TC, V35B, and V35B-TC, serials D4866 through D-9277; and Bonanzas 36 and A36, serials E-1 through E-273. Part I1 - The following aircraft if equipped with McCauley 2AF36C39, 2AF34C55, or 2AF36C89 propellers with counterweight assemblies as described in McCauley Service Bulletin No BEECHCRAFT Barons 95-55, 95-A55, 95-B55, and 95-B55A, serials TC-1 through TC-1396; and Barons 95435, 95-C55A, D55, D55A, E55, and E55A, serials TE-1 through TE-845. REASON: Part I - To comply with McCauley Service Bulletin No. 92. Part 11 - To comply with McCauley Service Bulletin No. 93. COMPLIANCE : Part I -As soon as practical after receipt of these Service Instructions, but within the next 100 hours of flight time. Part I1 - When the propeller is submitted for servicing of any kind, regardless of the number of hours the propeller has been in service. DESCRIPTION: Part I - Compliance with McCauley Service Bulletin No. 92 on the BEECHCRAFT Musketeers, Debonairs, and Bonanzas specified under Effectivity is recommended. McCauley Service Bulletin No. 92 supersedes Service Bulletin No. 66 dated January 22, Compliance with McCauley Service Bulletin No. 66 was recommended in Beech Aircraft Corporation Service Instructions No , original, dated February, No BECP 268 R971 Beech Alrcraft Corporation Issues servlce lnformallon for the beneflt of owners and flxed base operators In the form of three classes of Servlce lnstruct~ons CLASS I (Red Border) are changes. Inspections, and modlflcatlons that could affect safety The factory considers compllance mandatory CLASS II (Green Part I1 - Compliance with McCauley Service Bulletin No. 93 on the BEECHCRAFT Barons specified under Effectivity is recommended. BEECHCRAFT lnternatlonal Owner Notification Servlce List. (c) Those havlng a publlcatlons subscrlptlon CLASS Ill (No Border) covers changes whlch are opt~onal, maintenance alds Border) covers changes, rnod~f~cat~ons, Improvements or lnspecllons the factory product Improvement kits and miscellaneous servlce ~nformatlon Compliance 1s feels will beneflt the owner and although h~ghly recommended, they are not at the owner or operators prerogative Cop~es of Class Ill are dlstrlbuted per a considered mandatory compllance, unless speclfled at the tlme of Issuance and c above lnformatlon on Owner Notlflcatlon Service or Subscrlpt~ons can be Class I and II are malled to obtalned through any BEECHCRAFT Aero or Avlat~on Center, lnlernatlonal Dlstrlbutor and Dealer, or the Factory As Servlce lnstructlons are issued. (a) BEECHCRAFT Aero or Avlatlon Centers and lnternatlonal temporary notatlon In the Index should be made untll the Index 1s revised $ Dlstr~butors and Dealers Warranty will be allowed only when speclflcally deflned In the Service lnstruct~ons ur m (b) Owners of record on the FAA Reglstratlon list and the and In accordance wlth Beech Warranty Pollcy Member ol GAMA Gcnerol Arl.l,on Monulo'turcrs Asso<ooloon

2 Service Instructions No , -249, Rev. I MANPOWER: MATERIAL: SPECIAL TOOLS: WEIGHT AND BALANCE: REFERENCES : As required by the attached McCauley Service Bulletins. As required by the attached McCauley Service Bulletins. Parts are available through the Beech Aircraft Corporation Dealer Organization. As required by the attached McCauley Service Bulletins. As required by the attached McCauley Service Bulletins. Part I - McCauley Service Bulletin No. 92, Cylinder Attachment Improvement, dated April 2 1, and all subsequent revisions (if issued). Part I1 - McCauley Service Bulletin No. 93, Counterweight Attachment Improvement, dated April 21, 1971, Revision 93-1 dated June 30, 1971, Revision 93-2 dated July 28, 197 1, and all subsequent revisions (if issued). PUBLICATIONS AFFECTED: ACCOMPLISHMENT INSTRUCTIONS : RECORD COMPLIANCE: It is recommended that a note be made in all parts catalog copies to "See Service Instructions No , -249, Rev. I." As required by the attached McCauley Service Bulletins. Upon completion of modification, make an appropriate maintenance record entry, and return a completed compliance card to Beech Aircraft Corporation.

3 Qeechrnaft CLASS I SERVICE INSTRUCTIONS SUPPLEMENT NO. 1 No , -249, Rev. I ATA Code SUBJECT: EFFECTIVITY : REASON : COMPLIANCE : DESCRIPTION : MANPOWER: MATERIAL : SPECIAL TOOLS : WEIGHT AND BALANCE: REFERENCES : PROPELLER - 2-BLADED AND 3-BLADED - REVISION 93-3 TO McCAULEY SERVICE BULLETIN NO. 93, COUNTERWEIGHT ATTACH- MENT IMPROVEMENT. Same as specified for Part I1 of Service Instructions No , -249, Revision I. To comply with Revision 93-3 to McCauley Service Bulletin No. 93. Same as specified for Part I1 of Service Instructions No , -249, Revision I. McCauley Service Bulletin Revision 93-3, printed herein, should be attached to and complied with at the time of compliance with McCauley Service Bulletin No. 93, Revision 93-1, and Revision 93-2, which were issued with Service Instructions No , -249, Revision I. As required by Revision 93-3 to McCauley Service Bulletin No. 93. As required by Revision 93-3 to McCauley Service Bulletin No. 93. As required by Revision 93-3 to McCauley Service Bulletin No. 93. As required by Revision 93-3 to!qccauley Service Bulletin No. 93. Beech Aircraft Corporation Service Instructions No , -249, Revision I. McCauley Service Bulletin No. 93, Revision 93-1, and Revision PUBLICATIONS AFFECTED: ACCOMPLISHMENT INSTRUCT1 ONS : Same as specified in Service Instructions No , -249, Revision I. As required by Revision 93-3 to McCauley Service Bulletin No. 93. RECORD COMPLIANCE : No BECP Same as specified in Service Instructions No , -249, Revision I. 1 of 1 Beech ~tkk?hl~orporatlor Issues servlce lnlormat~on for the benel~l ol owners BEECHCRAFT lnternat~onal Owner Not~l~cat~on Servlce L1s1 and f~xed base operators 111 the form of three classes of Service lnstruct~ons lcl Those havlng a publlcat~ons subscrlpl~on CLASS I (Red Border) are changes lnspectlons and rnod~f~cat~ons that could aff~c' safely The factory cons~ders compl~ance mandatory CLASS It (Green CLASS Ill (No Border1 c overs changes whlch are opt~onal maintenance a~ds Border) covers changes modlflcal~ons lrnprovements or InspeLtlons the factory ptoducl Improvement k~ts and rnlscellaneous servlce ~nformal~on Cornpllance IS leels wlll benrllt the owner and although h~ghly recommended they are not at the owner or operator s prerogative Cop~es ot Cia% Ill are d~str~buted per a ~onsldered mandatory compliance unless speclfled at the tlme of Issuance and c above lnlormal~on on Owner Not~f~cat~on Servlce or Subscr~ptlons can be o Class I and II are malled to obta~ned through dny BEECHCRAFT Aero or Av~atlon Center lnternat~onal 0 o D~slrlbutor ard Dealer ot the Factory As Sew~ce lnstruct~ons are lssued N P la) BEECHCRAFT Aero or Av~at~on Centers and lnterndf~onal temporary nolatlon ~n the ~ndex should be made until the ~ndex IS rev~sed o D~slr~butors and Dealers Warranty will be allowed only when spec~f~cally def~ned ~n the Servlce lnstrucl~ons m TI (b) Owners of record on the FAA Reglstratlon lhst and the and In accordance wlth Beech Warranty Pollcy MI n b. I of LAMA

4 Qeechcrafft CLASS I SERVICE IHSTRUCTIONS SUPPLEMENT NO. 2 NO , -249, Rev. I ATA Code SUBJECT: EFFECI'IVITY: REASON : COMPLIANCE : DESCRIPTION: MANPOWER: MATE RIAL : SPECIAL TOOLS : WEIGHT AND BALANCE: REFERENCES : PROPELLER - 2-BLADED AND 3-BLADED - REVISION 92-1 TO McCAULEY SERVICE BULLETIN NO. IMPROVEMENT. 92, CYLINDER ATTACHMENT Same as specified for Part I of Service Instructions No , -249, Revision I. To comply with Revision 92-1 to McCauley Service Bulletin No, 92. Same as specified for Part I of Service Instructions No , -249, Revision I. McCauley Service Bulletin Revision 92-1, printed herein, should be attached to McCauley Service Bulletin No. 92 and complied with at the time of compliance with Service Bulletin No. 92, which was issued with Service Instructions No , -249, Revision I. As required by Revision 92-1 to McCauley Service Bulletin No. 92. As required by Revision 92-1 to McCauley Service Bulletin No. 92. As required by Revision 92-1 to McCauley Service Bulletin No. 92. As required by Revision 92-1 to McCauley Service Bulletin No. 92. Beech Aircraft Corporation Service ~nstructions No , -249, Revision I. McCauley Service Bulletin No. 92. PUBLICATIONS AFFECI'ED: Same as specified in Service Instructions No, , -249, Revision I. ACCOMPLI SHMENT INSTRUCTIONS : As required by Revision 92-1 to McCauley Service Bulletin No. 92. RECORD COMPLIANCE : No BECP 572 Same as specified in Service Instructions No, , -249, Revision I. Beech A~rcraft Corporalton Issues servtce ~nlorrnat~on the benef~t of owners BEECHCRAFT lnternatlonal Owner Not~t~cat~on Serv~ce Ltst and ftxed base operators In the form of three classes of Servlce lnstruct~ons CLASS I (Red Borderl are changes lnspectlons and mod~ftcal~ons that could ic) Those havlng a publ~cat~ons subscr~pt~on affec! salety Thp factory considers compliance mandatory CLASS II (Green CLASS Ill (No Border) covers changes wh~ch are opt~onal rnalnlenance alds Borderl covers changes mod~l~cal~ons Improvements or lnspectlons the lactory product lmprovernenl k~ls and rn~scellaneous servtce ~nforrnatlon Cornpltance IS feels w~ll benet11 the owner and although hlghly recorntnended they are not at the owner or operators prerogative Cop~es 01 Class Ill are dlstr~buted per a considered mandatory cornpilance unless specllled at the tlrne of Issuance and c above lnformat~on on Owner Not~l~catton Serv~ce or Subscr~pt~ons can be Class I and I1 are rna~led to c\1 la1 BEECHCRAFT Aero or Avlatlon Centers and lnternallonal 4 Dlstr~butors and Dealers m ibl Owners of record on the FAA Reglslralton l~st and the obtalned through any BEECHCRAFT Aero or Avlatlon Center lnternatlonal Dtstrtbutor and Dealer or the Factory As Serv~ce Inslructlons are Issued tenlporary notatton In the Index should be made unltl the Index 1s revtsed Warranty will be allowed only when spectflcally def~ned In the Service lnslruct~ons and In accordance wltti Beech Warranty Pollcy Mc.mbr, ul GAMA Gpnelol Arla!,on Manulo<lurer, A,\o<,ot#on

5 McCauley Industrial Corporation PARKER AVE AT HOWELL. BOX 7, ROOSEVELT STA. DAYTON. OHIO Area Code Cable Address: McCauley DOA APPROVED APRIL 21, 1971 NECESSARY AND REQUIRED ACTION (PRIOR TO OVERHAUL) This Bulletin Supersedes Service Bulletin No. 66 Dated 22 January TO: Affected Airframe Manufacturers (Aero Commander, Beech, Bellanca, Cessna, Fletcher, Lockheed, Macchi, Navion, and wren), FAA Approved Propeller Repair Stations, and McCauley Distributors. SUBJECT: Cylinder Attachment Improvement PROPELLER MODELS AFFECTED : Any Two or Three-Bladed Constant Speed on- eat he ring ) Model Listed In Table I That Has Cylinder Attached To Hub With Only (8) Screws And Washers, As Shown On Figure I-A. - NOTE Any propeller that has cylinder attached with (8) or (14) screws and tubes and a ring as shown on Figure I-B and II-B or with (14) screws and washers as shown in Figure II-A is - not affected by this bulletin. AIRCRAFT MODELS AFFECTED: Any Single-Engine Tractor Aircraft With Affected Propeller Installed. Table I1 Is A Listing Of Aircraft Models Where These May Be Found. CONDITION AND CORRECTION: There have been several recent incidents where the screws in the cylinder attachment with (8) short screws have failed, which permitted the cylinder to come off and caused a loss of engine oil. This experience has dictated the need for an improvement of the strength of the attachment. The length of the screw has been increased to allow the part to yield over a much longer length so as to significantly reduce stress concentrations. Affected propellers in service that have cylinders attached as shown in Fig. I-A shall have attachment changed as shown in Figure I-B (8 long screws and tubes plus ring). This work can be accomplished by an A & P mechanic without removing propeller from aircraft. 1. Remove spinner shell in accordance with aircraft manufacturer's instructions. 2. Remove the (8) screws and washers that attach cylinder as shown in Figure I-A. It is not necessary to remove cylinder from hub. 3. Attach cylinder as shown in Figure I-B. Install screws with 30 to 36 pound-inches torque - use a torque wrench. Lockwire screws with.032 inch diameter corrosion resistant steel. NOTE Sufficient parts for one propeller, excepting lockwire, are available from McCauley in a kit, part number PL-4388 (contains (8) A screws and B-4354 tubes and a B Replace spinner shell. COMPLIANCE: Accomplish corrective action within the next 100 hours of service, preferably at next 100 hour aircraft inspection. An entry indicating bulletin compliance shall be made in aircraft and engine/~ropeller log books. (page 1 of 4)

6 S.B. No. 92 Page (2) of (4) DETERMINATION OF AFFECTED PROPELLERS: The propeller hub has a model designation number and serial number impression stamped on side of hub of two-blade models, and on the outer diameter of front (cylinder end) cylindrical boss of three-blade models (located between blade sockets). The hub model and serial number should also be listed in the engine/ propeller log book, but the hub model may be incomplete and not include change letter (example: ~ 2~34~58-~ may be listed as ~2~34~58). Table I indicates the specific propeller hub models that are affected and the hub serial numbers which may be affected, while Table I1 indicates the aircraft on which they may be found. If the aircraft records indicate that an affected type propeller model is installed and the serial number is in the affected range, the spinner shell should be removed to see if cylinder attachment is as shown in Figure I-A and, if so, corrective action accomplished. NOTE: This bulletin does not supersede the overhaul action requirements of Service Bulletin No. 87 dated 6 November 1970 or Revision 87-1 dated 21,April TABLE I HUB MODELS THAT ARE AFFECTED BY SERVICE BULLETIN NO. 92 ~2~36~32 ~2~34~58-B 3~32~76-s "HUB SERIAL NUMBERS THAT MAY BE AFFECTED BY SERVICE BULLETIN NO. 92 All ~~XXXX, ~~XXXX, ~~XXXX, ~~XXXX, ~~XXXX, and 70XXXX serial numbers up to and including except for the following serial numbers which are excluded: thru thru thru thru "NOTE: Hub serial numbers will be encountered with five or six digits. The first two digits indicate the year in which hub was produced, while remaining digits indicate the number of the hub fabricated in that year. Example - S/N indicates hub was produced in 1965 and was the 1323rd one made in 1965.

7 McCauley Industrial Corporation PARKER AVE AT HOWELL. BOX 7, ROOSEVELT STA. DAYTON, OHIO Area Code Cable Address: McCauley SERVICE BULLETIN NO DOA APPROVED December 1971 (NECESSARY AND REQUIRED ACTION (PRIOR TO OVERHAUL) - TO: Affected Airframe Manufacturers (Aero Commander, Beech, Bellanca, Cessna, Fletcher, Lockheed, Macchi, Navion, and Wren), FAA Approved Propeller Repair Stations, and McCauley Distributors. SUBJECT: Supplemental Information Applicable To Service Bulletin 92 dated April 21, CONDITION: FAA Airworthines,s Directive was amended by Amendment , effective October This has caused confusion concerning propeller serial number effectivity aid a cl arification has been requested. The original A. D. was issued on our Service Bulletin No. 66 dated 22 January 1968 which required the removal of (8) fillister head type screws and the installation of (8) socket head type cap screws. We now require that these socket head screws be replaced with long fillister head screws, spacers and ring as mentioned in the subject bulletin. Service Bulletin no. 66 has been replaced by the subject Bulletin No. 92. Since many propellers not effected by Service Bulletin No. 66 have since undergone overhaul, the serial number effectivity of Bulletin No. 92 must be changed to cover those not covered previously. CORRECTION: Add 59XXXX, 60XXXX, 61XXXX, 62XXXX, 63XXXX, 64XXXX and 65XXXX serial numbers to the hub serial numbers that may be effected by Service Bulletin No. 92. The serial number effectivity listing on Table I (page 2 of 4) of original Bulletin No. 92 must be changed to read as follows: All 59XXXX, 60XXXX, 61XXXX, 62XXXX, 63XXXX, 64XXXX, 65XXXX, 66XXXX, 67XXXX, 68XXXX, 69XXXX, 70XXXX serial numbers up to and including except for the following serial numbers which are excluded: , thru , thru , thru , thru and NOTE: The specific models listed on Table I were known to have originally contained an (8) screw cylinder attachment. If there is any question as to whether a propelller is affected, the spinner may be removed to expose the cylinder attachment and compare it with Figure I-A (page 4 of 4) of the original bulletin. Correct as required. A (14) screw attachment as shown in Figure I1 is not affected. McCAULEY INDUSTRIAL CORPORATION NI;SLO z ilp:,t,l MbNUFbCTL.YtD r' M~TAL PWOPtlltRS &OR MUSlt4lSS AND PLE'ISURI AIR( RAFT

8 McCauley S.B. 92, Page (3) of (4) TABLE I1 ; AFFECTED PROPELLERS 2~34~8/78~~ 2A36C23/84B Beech A AIRCRAFT MODELS ON WHICH THEY MAY BE INSTALLED Beech 35-33, -A339 -~33,-c33, -C33A, -E33, E33AY -E33C, -F33, - F33A, and F33C; H35, 535, K35rM35~ N35, P35, S35y V35y V35A and V35B; 36 and ~ 36. Cessna 180 series, 182 and 182~ thru G. ~2~36~3b/gOM (and) ~2~36C31/90M Bellanca ; Fletcher ~ ~ ; Lockheed ; Meyers (~ero commander) 200-A thru C; & Navion F. Navion E. Bellanca ; Cessna 185, 185A thru D, 205, 205A, 210, 210A thru C; Fletcher ~ ~ 2 Lockheed 4 ; 402-2; Macchi ~ ~ 6 Meyers 0 ; (Aero commander) 200-A thru C; & Navion By F, G & H. Fletcher ~ ~ 2 4. Cessna 185, 185~ thru E, 205, ~ 210 ~ & 210A thru C. Cessna 180 series, 182, 182~ thru My 188 & 188A; and Wren 460. Aero Commander or Meyers 200 & 200D; Cessna 185, 185~ thru Ey ~ 1 8 ~188, 5 ~ ~ A188A, 205, 205A, 206, ~206 & ~ ~ 2 Float 0 6 Plane, ~ P206A, ~206 series, Tu206 series Float Plane; 207 series, 210, 210A thru D; & Navion A, By D, E, F, & G. Cessna 180 series, 182, 182~ thru My 188, 188~ & Wren 460. Cessna ~ ~ 2 and 0 6 T210 series Landplane. Cessna ~206 series Landplane, 210E & subsequent. Beech 35-C33, -C33Ay - E33A & -F33A; 535, V35, V35A & V35B; S35TC~ V35TC, V35A-TC & V35B-TC; 36 & A36. v Cessna p206a, TP~o~A, 210F, and T210F Land~laneS. Cessna TU 206 & T2O7 series Landplane. Cessna P206A, U206A and ~ ~ 2 series 0 6 Landplanes. Cessna ~206 & ~ ~ 2 series 0 6 Landplanes, 210F & subsequent and T210F & subsequent. Cessna ~ 2 0 Landplane, 6 ~ U206 series, ~ ~ 2 series, series & T2O7 series; and Navion A, By D, E, F, G & H.

9 McCauley S Page 4 of 4 CYLINDER ATTACHMENTS UN ACCEPTABLE ATACHMNT REQUIRl NG CORRECTlON 8 REQ'D ACCEPTABLE ATTACHMENT FOR FIELD CORRECTION FIGURE I A SCREW A WASHER 14EA. REQ'D ACCEPTABLE ATTACHMENT INTERIM PRODUCTION L~-4354 TUBE L~-4342 RING 14 REQ'D ACCEPTABLE ATACHMENT CURRENT PRODUCTiON FIGURE ll

10 McCauley Industrial Corporation PARKER AVE AT HOWELL * BOX 7, ROOSEVELT STA.. DAYTON. OHIO Area Code Cable Address: McCauley SERVICE BULLETIN NO. 93 DOA APPROVED APRIL 21, 1971 NECESSARY AND REQUIRED ACTIOlV TO: Beech Aircraft Corporation, Cessna Aircraft Company, FAA Approved Propeller - Repair Stations, and McCauley Distributors. SUBJECT: Counterweight Attachment Improvement PROPELLER MODEL AFFECTED: Two-Blade Full Feathering Propellers Model 2 ~~36~39, ~2~~36~48, ~2~~34~52, 2~~34~55 and 2~~36~89 Which Incorporate Counterweight Assemblies That Have A-3372 Brackets Across The Counterweight Arms And Have Brackets And Weights Attached With (4) Socket Head Cap Screws. AIRCRAFT MODEL AFFECTED: Beech 95-55, -A55, and B55; And Cessna 310C Through 1. CONDITION: Several counterweight or attachment failures have been experienced which dictates a need for improvement. CORRECTION: The screws that attach brackets and weights to counterweight arm are to be replaced by bolts, which will pass completely through from one side of weights, brackets and arm to the other side. This change will effect the type and amount of weights installed. Table I-A attached is a listing of parts required for the improved attachment and indicates the quantity required for each propeller assembly. Figures No. 1-3 attached indicate how parts are installed with respect to each other. For reference, Table I-B attached is a listing of previous attachment parts which have now been superseded. COMPLIANCE: Accomplish corrective action whenever propeller is submitted for servicing of any kind (overhaul, repair, reconditioning, etc.), regardless of the number of hours of service. PROCEDURE: If propeller is being serviced for a condition that does not require re-balance, note the type, number and location of balance weights to permit reinstallation in same location. Remove counterweights and attaching parts (see Table I-A). 2. Use a drill press (do not use hand held drill) to accomplish the following: a. Open up the two #lo-32 threaded holes in each half of the D-1945 or D-3156 counterweights to inches diameter through. b. Open up the two inch diameter holes in the A or A-2331 weights to through, which will convert them to an A or A-3330 part number respectively. c. Open up the four inch diameter holes in the A-3372 brackets to through, which will convert them to an A-3372-A part number. 3. Deburr all drilled holes. Clean (strip) and cadmium plate the modified counterweights, weights and brackets. 4. Refer to Table I-A and note that A weights required for all models and A-3330

11 McCauley S.B. 93 Page 2 of 6 weights for 2~~34~55 and 2~~36~89 are obtained by reworking A and A However, new A-3330 weights must be obtained for ~ 2 ~ ~ 3 and 6 ~ ~ 4 28 ~ ~ 3 since 4 ~ 5 no 2 A-2331 weights were previously used. New A , -56 and -57 bolts must be obtained for all models. 5. Disassemble and reassemble propeller as required by Service Manual NO to accomplish overhaul or required servicing. Install counterweight onto ferrule as required by manual (para. 2-32i, Chap. I, Sect. 111, Pgs. 35 & 36). Assemble modified counterweight parts as follows (see Table I-A and Figs. No. 1, 2 and 3). a. Install 2 brackets (A-3372-~) on each pair of counterweight halves, so that they overlap at sides, one from top and one from below on opposite side, with bracket holes aligned with through-holes in counterweight arms. Full-width chamfered end of bracket MUST be at very end of arm, farthest from hub. Locate weights (A-3330 and A ) on each side of bracket and attach with bolts (A , 56 or 57), washers (A ) and nuts (A ). Center weights on side of arm and hold in place until tightening of bolts is sufficient to prevent movement. Tighten bolts with 75 to 85 pound-inches torque. CAUTION Attach brackets and weights with two A washers under the head of each A , 56 or 57 bolt, but if tolerance build up of parts does not permit end of bolt to protrude past the end of nut by at least 1/32 inch, remove a washer and repeat procedure until it does. b. Recheck torque of counterweight-to-ferrule attaching bolts (A and -2) after weights and brackets have been attached and their attachment bolts are torqued. If re-tightening is required, recheck torque of weight and bracket bolts. Repeat procedure until all bolts are properly torqued Should it be necessary to replace a D-1945 or D-3156 counterweight, obtain replacement as specified in Service Bulletin No. 83. NEW AND OBSOLETE PARTS: 1. A and A-3330 weights, A washers and A nuts have been used previously and should be a stock item. 2. A , -56, and -57 bolts are new items and should be promptly ordered. 3. A weights and A-3372 brackets are now obsolete and no longer available. Those in stock may be reworked into A weights or A-3372-A brackets, respectively. A-3372-A brackets are now available. 4. A-2331 weights are still required for other models and are available. 5. A and -61 screws are now obsolete and no longer available. - NOTE: The service manuals specify that all steel parts shall be inspected by magnetic particle process, Specification MIL ; all aluminum alloy parts by fluorescent penetrant method, Specification MIL It is necessary to reiterate this fact and note that the counterweights and attaching parts - must be magnetic particle inspected whenever propeller is overhauled. McCAULEY INDUSTRIAL CORPORATION

12 McCauiey Industrial Corporation PARKER AVE AT HOWELL BOX 7. ROOSEVELT STA. DAYTON. OHIO Area Code Cable Address: McCauley SERVICE BULLETIN NO DOA APPROVED 30 JUNE 1971 NECESSARY AND REQUIRED ACTION (This Bulletin Replaces Service Bulletin No. 56 Dated 16 March 1964) TO: Beech Aircraft Corporation, Cessna Aircraft Company, FAA Approved Propeller Repair Stations, and McCauley Distributors. SUBJECT: Revision to Service Bulletin No. 93 dated 21 April CONDITION: 1. It was not previously indicated that Service Bulletin No. 56 dated 16 March 1964 was to be replaced. This bulletin covered 2AF34C55 model series. 2. Previously it was assumed that a1 1 2AF34C55 model propellers would have been serviced for Bulletin No. 56 compliance, which should be the case but may not be. Further, the Tab1 e 2-A 1 i sted only one previous (obsolete) configuration of D-3156 counterweights, weights and brackets, and attaching parts for the 2AF34C55 propel 1 ers. 3. Several stations have inquired about the necessity of magnetic particle process inspection for counterweights and A and -2 attaching bolts. This is required. Some failures were undoubtedly caused by the omission of such inspection in the past. 4. Information was not included earlier to indicate the previous bulletins that will require compliance at the same time as Service Bulletin No. 93. CORRECTION: 1. For reference, mark file copies of Bulletin 56 to indicate replacement by Bulletin 93. The PL-3376 Counterweight Improvement Kit previously supplied for Bulletin 56 is obsolete and no longer available. Obtain parts listed in Table I-A, Bulletin 93. All 2AF34C55 models must have bolts which pass completely through from one side of weights or weight/bracket combinations and counterweight arm to the other side. 2. The fol lowing tab1 e shows the previous (now obsolete) weight and bracket configurations for the 2AF34C55 propellers that may be encountered and which must be changed to configuration shown in Table I-A. 2AF34C55 Propeller With D-3156 Counterweight Original 1st Production Change & 2nd Production Configuration Bulletin No. 56 Change Change * Weights & Brackets A Weight (12) (8 (4 ) A-2331 Weight ( 4) None (4 A-3372 Bracket None (4) (4) Weights And Brackets-To-Counterweights Attaching Parts A Screw ( 8) None A Screw None (8) A Screw None None (8) * The 2nd production change is that listed in Table 2-A of subject bulletin and in Table I1 of Service Bulletin NO. 83. WORLD'S LARGEST MANUPACTURER OP METAL?lO? llers POI BUSINESS AND PLEASURE AlRCRAPT None None

13 McCauley S.B Page 2 of 2 3. Use a pen to add a numeral "1" for first paragraph under "PROCEDURE" in subject bulletin and change last sentence in first step to read as follows: "Remove counterweights and associated parts - inspect counterweights and A and -2 attaching bolts by magnetic particle process (Spec. MIL ) and reject any cracked parts - replace A nuts, do not reuse." 4. NOTE : When propel 1 ers are received for any servicing that requires disassembly, overhaul, repair, or for compliance with Bulletin No. 93, co,mpl iance with previous bulletins will also be required as follows: a. Service Bulletin No. 88 which affects D2AF34C52 and 2AF34C55 propellers and requires hub replacement or rework. b. Service Bulletin No. 84 which affects 2AF34C55 propellers and requires a change in the cylinder attachment screw. c. Service Bulletin No. 83 may affect all the models that are affected by Bulletin No. 93 (C39, C48, C52, C55 and C89) if it is necessary to replace counterweights and repair station does not have any old style in stock. d. Service Bulletin No. 80 which affects all models (C39, C48, C52, C55 and C89) and requires the use of a specific type sealant and assembly operations at blade-ferrule and hub-lock ring-retention nut junctions. e. Service Bulletin No. 62 which affects a11 models (C39, C48, C52, C55 and and requires a blade actuating pin change. McCAULEY INDUSTRIAL CORPORATION

14 McCauIey Industrial Corporation PARKER AVE AT HOWELL BOX 7, ROOSEVELT STA.. DAYTON. OHIO Area Code Cable Address: McCauley SERVICE BULLETIN NO DOA APPROVED 28 JULY 1971 NECESSARY AND REOUIRED ACTION TO: Beech Aircraft Corporation, Cessna Aircraft Company, FAA Approved Propeller - Repair Stations, and McCauley Distributors. SUBJECT: Supplimental Information Applicable to Service Bulletin No. 93 dated 21 April 1971, and Service Bulletin 93-1 dated 30 June CONDITION: An FAA Airworthiness Directive will be issued on the 2AF34C55 Propeller, which is covered in Service Bulletin No. 93. It will require the counterweight attachment improvement to be accomplished within a specified number of service hours. The general word description for the affected propeller models was sufficient for normal bulletin compliance, but a specific model and serial number affectivity, as shown in Tables I11 and IV of this revision, is preferred for compliance with the Airworthiness Directive. CORRECTION: (1) At the end of the paragraph and under the caption of Propeller Model Affected on Page 1 of Service Bulletin 93 dated April 21, 1971, use a pen and add the words "See Table I11 and IV on Service Bulletin 93-2 for specific 2AF34C55 Models and Serial Number Affectivity". (2) The tables indicating propeller model and serial number affectivity are as follows: TABLE I11 2AF34C55 MODEL~AFFECTED *NOTE: Not all 2AF34C55N Propeller Models are affected. Only new detail hubs shipped for spares and assembled in the field with old type counterweights are involved. Excepted serial numbers shown in Table IV are new propeller assemblies which contain D-4170 counterweights and are - NOT affected by this bulletin. Continued on Page 2 WORLD'S LARGEST MANUFACTURER OF METAL PROPELLERS FOR BUSINESS AND PLrAsure AIRcnArr.

15 McCauley S. B Page 2 of 2 TABLE IV HUB SERIAL NUMBERS up to and including except for the following serial ntmbers: and thru thru and thru thru thru and and and thru thru thru thru thru and and and thru and thru thru thru thru and thru thru and thru and thru thru and thru thru thru thru and thru thru thru thru thru and thru thru and thru thru thru and thru and thru and and and NOTE: Hub serial numbers are of six digits. The first two digits - indicate the year in which the hub was produced while the remaining digits indicate the number of the hub fabricated in that year. EXAMPLE: Hub S/N indicated that the part was produced in 1970 and was the 1234th hub made in 1970.

16 McCauley Industrial Corporation PARKER AVE AT HOWELL. BOX I, R OOSEVELT STA DAYTON, OHIO Area Codr 513 2f> Cable Address McCauley SERVICE BULLETIN NO DOA APPROVED SEPTEMBER 27, 1971 NECESSARY AND REQUIRED ACTION TO: Beech Aircraft Corporation, Cessna Ai rcraft Company, FAA Approved Propel 1 er - Repai r Stations, and McCaul ey Di s tri bu tors. SUBJECT: Supplelnental Information Applicable to Service Bulletin No. 93 dated 21 April 1971, 93-1 dated 30 June 1971 and 93-2 dated 28 July CONDITION: An FAA Airworthiness Directive No has been issued to cover the requirements of Service Bulletin No. 93 and its revisions. The No Revision dated 30 June 1971, under CORRECTION Paragraph No. 4, indicated that propellers which were received for compliance with the Service Bulletin No. 93 counterweight change only would a1 so have to be serviced for compliance with Service Bulletins No. 88, 84, 83, 80 and 62, which was not the intent. It is necessary to now define the disassembly procedure under which compliance with all these bulletins is required. CORRECTION: If a propeller is received for compliance with Service Bulletin -93 Airworthiness Directive No ) and during the subsequent servicing it is necessary for any reason whatsoever to disassemble the propeller to the extent of removing the blade assemblies from the hub, then it is necessary to also comply with Service Bulletins No. 88, 84, 83, 80 and 62, as applicable. If the servicing *requires only the removal of the counterweights to comply with Service Bulletin No. 93, then compliance with the other bulletins is not required at that time, but such compliance will be required later when the propeller is overhauled or is serviced for any reason where removal of blade assemblies from the hub is required. In the case where blade assemblies are not being removed and compliance with the other bulletins is not required, it is necessary to thoroughly examine visually, with a 10X power glass, all of the hub external surfaces, for signs of a crack or any unusual condition. NOTE: A number of people have asked if compliance with Service Bulletin No. 93 can be accomplished by an A & P Mechanic, and the answer is NO. The work must be accomplished by an FAA Approved Propeller Repair Station. McCAULEY INDUSTRIAL CORPORATION W'JPLi) 5 targe51 UAPIOtA<lJREP OF MtTAt PROPE,LERS FOR BUSlNES5 A N D PIEASURC AIRCRAFT

17 McCauley S.B. 93 Page (3) of (6) TABLE I-A IMPROVED COUNTERWEIGHT ATTACHMENT PARTS Attachment Propeller Model Parts 2~~36~39 ~ 2 ~ ~ 3 6 ~ 4~ 82 ~ ~ 3 4 ~ 5 2AF34C55 2~~36~89 Counterwt. *D-1945 (2) D-1945 (2) * D-3156 (2) D-3156 (2) D-1945 (2) Counterweight-To-Ferrule Attaching Parts - Reference - Same As Used Previously Bolt (5116") A-2513-l(2) A-2513-l(2) A-2513-l(2) A (2) A (2) Bolt (5/16") A (2) A (2) A (2) A (2) A (2) Spacer A-1944 (8) A-1944 (8) A-1944 (8) A-1944 (8) A-1944 (8) Nut ( 5/16") A (4) A (4) A (4) A (4) A (4) Weight ** A (12) A (8) A (8) A (4) A (4) Weight - # A-3330 (4) A-3330 (4) A-3330 (4) A-3330 (4) Bracket ## A-3372-A (4) A-3372-A (4) A-3372-A (4) A-3372-A (4) A (4) Weight & Bracket-To-Counterweight Attaching Parts Bolt ( 1/4" ) A ( 4) A ( 4) ~ (4) A ( 4) A (4) Washer (1/4") A A A A A Nut (1/4") (as req'd) A ( 4) (as req'd) A ( 4) (as req'd) A ( 4) (as req'd) A ( 4) (as req'd) ~ ( 4) *D-1945 or D-3156 counterweight modified in accordance with this bulletin **A is 3/16" thick and has.260-,275" diameter holes. #A-3330 is 1/16" thick and has " diameter holes. ##A-3372-A is 1/16" thick and has diameter holes. TABLE 2-A PREVIOUS ( OBSOLETE ) COUNTERWEIGHT ATTACHMENT PARTS Count erwt. D-1945 (2) D-1945 (2) D-3156 (2) D-3156 (2) D-1945 (2) Weight * A-2881-l(12) A (8) A (8) A (4) A (4) Weight ** A-2331 (4) A-2331 (4) Bracket #A-3372 (4) A-3372 (4) A-3372 (4) A-3372 (4) (4) Weight & Bracket-To-Counterweight Attaching Parts Screw (#lo) A (8) A ( 8) A ( 8) A ( 8) A ( 8) *A is 3/16" thick and has, " diameter holes - same asa except for hole size. **A-2331 is 1/16" thick and has diameter holes - same as A-3330 except for hole size. #A-3372 is 1/16" thick and has diameter holes - same as A-3372-A except for hole size.

18 C39 COUNTER WEIGHT CON FIGURATION ASSEMBLE PARTS AS SHOWN. REBALANCE PROPELLER IN LATCH POSITION SHOWN. FIGURE NO. 1

19 C48 & CSZ COUNTERWEIGHT CON FIGURATION ASSEMBLE PARTS AS SHOWN. REBALANCE PROPELLER IN LATCH POSITION SHOWN. FIGURE NO. 2

20 ~~~ COUNTER I muration ASSEMBLE PARTS AS SHOWN, REBALANCE PROPELLER IN LATCH POSITION.CHOWN. Figure No. 3