Component Maintenance Manual

Transcription

1 Component Maintenance Manual SM-6470 Bell Helicopter Models: 206A, 206B, 206L, 206L-1, 206L-3, 206L-4 LB FOR INSTALLATION & MAINTENANCE OF ELASTOMERIC TAIL ROTOR FLAPPING BEARING KIT LORD CORPORATION 2455 Robison Road West ERIE, PENNSYLVANIA USA 814: June 02/16

2 [Blank Page]

3 2455 Robison Road West ERIE, PA USA FOR INSTALLATION & MAINTENANCE OF ELASTOMERIC TAIL ROTOR FLAPPING BEARING KIT LORD PART NUMBER: LB Page T-1 Jun 02/16

4 [Blank Page]

5 SAFETY ADVISORY WARNING: BEFORE THE MATERIALS CALLED OUT IN THIS PUBLICATION ARE USED, KNOW THE HANDLING, STORAGE AND DISPOSAL PRECAUTIONS RECOMMENDED BY THE MANUFACTURER OR SUPPLIER. FAILURE TO COMPLY WITH THE MANUFACTURER'S OR SUPPLIER'S RECOMMENDATIONS CAN RESULT IN PERSONAL INJURY OR DISEASE. This publication describes physical and chemical processes which can make it necessary to use chemicals, solvents, paints and other commercially available materials. The user of this publication must get the Material Safety Data Sheets (MSDS) (OSHA Form 20 or equivalent) from the manufacturers or suppliers of the materials to be used. The user must know the manufacturer/supplier information and keep to the procedures, recommendations, warnings and cautions set forth for the safe use, handling, storage and disposal of the materials WARRANTY/LIABILITY ADVISORY WARNING: LORD CORPORATION ASSUMES NO RESPONSIBILITY FOR ANY TAIL ROTOR FLAPPING BEARING KIT WHICH IS NOT MAINTAINED AND/OR REPAIRED IN ACCORDANCE WITH THESE PUBLISHED INSTRUCTIONS AND/OR LORD CORPORATION FAA/FAR 36 REPAIR AUTHORIZATIONS. NEITHER DOES LORD CORPORATION ASSUME RESPONSIBILITY FOR SPECIAL TOOLS AND EQUIPMENT FABRICATED BY COMPANIES OTHER THAN LORD CORPORATION. INCORRECTLY REPAIRED COMPONENTS CAN AFFECT AIRWORTHINESS OR DECREASE THE LIFE OF COMPONENTS. INCORRECTLY FABRICATED SPECIAL TOOLING OR EQUIPMENT CAN RESULT IN DAMAGE TO PRODUCT COMPONENTS OR GIVE UNSATISFACTORY RESULTS. EQUIPMENT OR PARTS THAT HAVE BEEN REPAIRED OR FABRICATED BY OTHER THAN LORD CORPORATION AUTHORIZED FACILITIES CAN INCREASE RISKS OF DEATH OR PERSONAL INJURY, COMPONENT FAILURES AND SECONDARY DAMAGE AND CAN VOID WARRANTIES UNDERWRITTEN BY LORD CORPORATION. Page SWLA-1 Jun 22/11

6 [Blank Page]

7 RECORD OF REVISIONS Retain this record in the front of the manual. On receipt of revisions, insert revised pages in manual. Enter revision number, date issued, date inserted and initials. REV NO. DATE ISSUED DATE INSERTED BY REV NO DATE ISSUED DATE ISSUED BY 1 April 25, June 22, June 02, 2016 Page RR-1 Jun 02/16

8 [Blank Page]

9 SERVICE BULLETIN LIST SERVICE BULLETIN NUMBER REVISION NUMBER DATE BULLETIN INCORPORATED INTO MANUAL Page SBL-1 Jun 22/11

10 [Blank Page]

11 LIST OF EFFECTIVE PAGES SUBJECT PAGE DATE TITLE PAGE T-1 Jun 02/16 SAFETY ADVISORY WARRANTY / LIABILITY ADVISORY SWLA-1 Jun 22/11 RECORD OF REVISIONS RR-1 Jun 02/16 SERVICE BULLETIN LIST SBL-1 Jun 22/11 LIST OF EFFECTIVE PAGES LEP-1 Jun 02/16 TABLE OF CONTENTS TC-1 Jun 22/11 INTRODUCTION INT-1 Jun 02/16 1 Jun 02/16 2 Jun 02/16 DESCRIPTION AND OPERATION 3 Jun 02/16 4 Jun 02/16 TESTING AND FAULT ISOLATION 101 Jun 22/11 SCHEMATICS AND WIRING DIAGRAMS Jun 22/16 Jun 22/11 Jun 02/16 Jun 02/16 DISASSEMBLY 301 Jun 02/16 CLEANING 401 Jun 02/16 INSPECTION / CHECK Jun 22/11 Jun 22/11 Jun 22/11 Jun 02/16 Jun 22/11 REPAIR 601 Jun 22/11 ASSEMBLY 701 Jun 02/16 FITS AND CLEARANCE 801 Jun 22/11 SPECIAL TOOLS, FIXTURES AND EQUIPMENT 901 Jun 22/11 ILLUSTRATED PARTS LIST Jun 22/11 Jun 22/11 Jun 02/16 Jun 02/16 Jun 02/16 SPECIAL PROCEDURES 1101 Jun 22/11 REMOVAL 1201 Jun 22/11 INSTALLATION 1301 Jun 22/11 SERVICING 1401 Jun 02/16 STORAGE 1501 Jun 02/16 REWORK 1601 Jun 22/11 Page LEP-1 Jun 02/16

12 [Blank Page]

13 TABLE OF CONTENTS SECTION PAGE INTRODUCTION... INT-1 DESCRIPTION AND OPERATION... 1 TESTING AND FAULT ISOLATION SCHEMATIC AND WIRING DIAGRAM DISASSEMBLY CLEANING INSPECTION CHECK REPAIR ASSEMBLY FITS AND CLEARANCE SPECIAL TOOLS, FIXTURES AND EQUIPMENT ILLUSTRATED PARTS LIST SPECIAL PROCEDURES REMOVAL INSTALLATION SERVICING STORAGE REWORK Page TC-1 Jun 22/11

14 [Blank Page]

15 APPROVAL The following section/s of this Service Manual, SM-6470, are FAA DER approved in accordance with for latest revision. Jun 02/16

16 [Blank Page]

17 INTRODUCTION This publication contains shop maintenance instructions with Illustrated Parts List (IPL) for the LB Tail Rotor Flapping Bearing Kit manufactured by LORD Corporation. These instructions provide information necessary to conduct maintenance functions ranging from simple checks to component bearing assembly replacement. The instructions are divided into sections per ATA standard format and are shown in the preceding Table of Contents. Section 1 (DESCRIPTION AND OPERATION) contains a brief overview of the bearing kit including LORD part numbers. Sections 200 (SCHEMATICS AND WIRING DESIGN), 300 (DISASSEMBLY), 400 (CLEANING) and 500 (INSPECTION / CHECK) covers removal of bearing assemblies from the aircraft and acceptable procedures to determine serviceability of the bearing assembly. Sections 600 (REPAIR) and 700 (ASSEMBLY) provide procedures necessary for restoring the bearing assemblies to serviceable condition, and section 1400 (SERVICING) provides information regarding, repair, remanufacturing and technical support. Section 1000 (ILLUSTRATED PARTS LIST) provides a breakdown of assemblies, subassemblies and parts within the LB flapping bearing kit. Sections 1200 (REMOVAL) and 1300 (INSTALLATION) refer to the aircraft maintenance manual. Sections 100 (TESTING AND FAULT ISOLATION, 800 (FITS AND CLEARANCES), 900 (SPECIAL TOOLS, FIXTURES AND EQUIPMENT), 1100 (SPECIAL PROCEDURES) and 1600 (REWORK) are not used. This manual should be used in conjunction with the appropriate aircraft maintenance manual. The procedures in this manual are only to be performed by qualified shop mechanics that are familiar with this type of equipment. Page INT-1 Jun 02/16

18 [Blank Page]

19 DESCRIPTION AND OPERATION Description The LB tail rotor elastomeric flapping bearing kit consists of a single elastomeric flapping bearing assembly, P/N LB , two brackets, P/N Y , which are used to position and secure the flapping bearing in the tail rotor hub assembly, an identification plate, P/N Y ; an optional weight P/N Y , which may be installed on the Bell 206 tail skid as needed, to assist in the dynamic balancing of the tail rotor hub and blade assembly, a decal P/N Y and attaching hardware. Operation The LORD elastomeric tail rotor flapping bearing kit P/N LB has the capability by its unique design to reduce unscheduled maintenance actions, reduce tail rotor vibration levels and improve direct operating costs. In addition to reducing maintenance man-hours, the elastomeric trunnion bearing has an indefinite life cycle based on inspections and on-condition replacement. The flapping bearing P/N LB can be replaced while re-using the other serviceable components in the P/N LB kit. Page 1 Jun 02/16

20 1) Modification of Tail Rotor Hub Assemblies (ALL) A) Remove tail rotor hub and blade assembly from helicopter in accordance with the applicable Bell 206 Maintenance Manual. B) Disassemble tail rotor hub and blade assembly in accordance with applicable Bell 206 Component Repair & Overhaul Manual. C) Disassemble tail rotor hub assembly in accordance with applicable Bell 206 Component Repair & Overhaul Manual to remove trunnion and bearing housings D) Trunnion and bearing housing will no longer be required and should be tagged accordingly. Retain hardware and balance weights. E) If tail rotor hub is to be overhauled at this time, continue procedures in accordance with applicable 206 Component Repair & Overhaul Manual. F) If no further maintenance actions are required on the tail rotor yoke, thoroughly clean to remove grease, oil and dirt and inspect for visual damage in accordance with applicable 206 Component Repair & Overhaul Manual. G) Ensure yoke bores are free of nicks, dents and gouges per the applicable Bell 206 Component Repair & Overhaul Manual. H) (Steps 1I 1L Reference Figures and 200-2) Note: If necessary, heat may be applied to the yoke to ease installation of flapping bearing. Do not allow flapping bearing to be exposed to heat higher than 160 F. When using heat, it is recommended to use a temperature indicator stick or calibrated optical pyrometer. Page 2 Jun 02/16

21 I) Install elastomeric flapping bearing (2) in yoke (1) and align dovetail grooves as shown in Figure 200-1, View A. J) Position brackets (3) to dovetail grooves of bearing (2). Note: Bolt (6) length, number of washers (5) and weights (4) will be determined during static balance in accordance with applicable Bell 206 Component Repair & Overhaul Manual and Illustrated Parts Breakdown. K) Install bolts (6) and washers (5) with only a few threads of the bolts engaged in the yoke. Do not torque bolts; the bolts are used to keep the brackets aligned during the next step. L) Using a 4 c-clamp or larger, as shown in Figure 200-2, slowly tighten c-clamp until brackets contact yoke. M) Torque bolts (6) uniformly to 30 to 40 inch-pounds. N) Install the LORD modification plate (7) on the yoke using either Magnolia Magno Bond #6398 or a similar product. O) Re-assemble tail rotor hub and blade assembly in accordance with applicable Bell 206 Component Repair & Overhaul Manual. P) Static balance tail rotor hub and blade assembly in accordance with Section ) Install Tail Skid Weight (Optional) Note: Installation of the tail skid weight (10) is optional at the installer s discretion. If the tail rotor can be dynamically balanced within the limits specified in the applicable Bell Maintenance Manual, then the tail skid weight is not required. If the dynamic balance limits cannot be met, then install the tail skid weight per steps A through K. Note: As an alternate means of compliance for this Section, Bell Helicopter Textron Technical Bulletin No. 206L may be accomplished in lieu of Steps A through K. A) Remove the tail skid (9, Figure 200-3) from the vertical fin (8) in accordance with the appropriate 206 Series Maintenance Manual. Note which tail skid is being used. B) Mark the location of the new holes in the tail skid, (Figure 200-4, Detail B). Note the difference in the dimensions for each skid. C) Drill two holes of inches diameter to align with the weight (10), (Figure 200-4, Detail B) D) Apply a layer of sealant (Bell C-251 or MIL-PRF-81733D) on mating surface of the weight (10). E) Install weight (10) on tail skid. F) Apply sealant (Bell C-251 or MIL-PRF-81733D) on the bolts (11) and attach optional weight (10) to the tail skid (9) with the bolts (11), the washers (12) and nuts (13). Torque nuts 25 to 35 inchpounds. G) Paint weight to match aircraft. H) Install the decal (14) on the top of the weight (10) and apply a layer of clear paint (MIL-PRF D (3), clear) on the decal. I) If a roll pin was previously used to retain the tail skid in the vertical fin, drill inch dia. Hole through the vertical fin (8) and the tail skid (9). Page 3 Jun 02/16

22 J) Apply sealant (AMS-S-8802) to the tail skid area of the mount in the vertical fin. Note: Make sure to install the nut (17) on the tail rotor side of the vertical fin (8) (refer to Figure 200-3, Detail A). K) Put the tail skid (9) into the mount on the vertical fin (8) and install the bolt (15), washers (16) and nut (17), torque nut inch-pounds. Safety with the cotter pin (18). L) Depending on which model 206 helicopter the tail skid weight is installed on, weight and balance will be affected as follows: Series Longitudinal Weight Change Skid Assembly ARM Moment Lateral Weight Change 206 A/B +2.1 Lbs in-lbs. Not affected 206L +2.1 Lbs in-lbs. Not affected Skid Assembly ( Hooked ) 206 A/B +2.1 Lbs in-lbs. Not affected 206L +2.1 Lbs in-lbs Not affected M) Upon completion of this modification, make the appropriate entries in the helicopter logbook and component historical records. Page 4 Jun 02/16

23 [Blank Page]

24 TESTING AND FAULT ISOLATION [NOT APPLICABLE] Page 101 Jun 22/11

25 [Blank Page] Page 202 Jun 22/11

26 SCHEMATICS AND WIRING DESIGN Figure 200-1: Tail Rotor Hub Assembly Disassembly / Assembly Page 201 Jun 22/11

27 Figure 200-2: Tail Rotor Hub Assembly Disassembly / Assembly Page 202 Jun 22/11

28 (OPTIONAL) Figure 200-3: Weight Installation Page 203 Jun 02/16

29 DETAIL B OPTIONAL WEIGHT INSTALLATION Figure Weight Installation Optional Page 204 Jun 02/16

30 Disassemble Tail Rotor Hub Assembly LORD CORPORATION DISASSEMBLY Remove tail rotor hub and blade assembly from helicopter in accordance with applicable Bell 206 Maintenance Manual. Disassemble tail rotor hub and blade assembly in accordance with applicable Bell 206 Component Repair & Overhaul Manual. (Reference Figure 200-1) Disassemble the tail rotor hub assembly using the following procedure: A. Cut lock wire and remove bolts (6), washers (5), weights (4) and brackets (3) from each side of yoke. Retain weights and extra washers for static balancing. Note: If necessary, heat may be applied to the yoke to ease removal of flapping bearing. Do not allow flapping bearing to be exposed to heat higher than 160 F. When using heat, it is recommended to use a temperature indicator stick or calibrated optical pyrometer. B. Remove flapping bearing (2) from the yoke (1). Page 301 Jun 02/16

31 [Blank Page]

32 CLEANING Cleaning Note: The elastomeric flapping bearing should not be soaked or immersed in alcohol or come in contact with any other type of cleaning solvent. It is recommended that the elastomeric portion of the flapping bearing be cleaned with warm soapy water (up to 140 F) to remove grease, oils and dirt. Denatured alcohol may also be used to clean the elastomer, however, should only be applied with a rag by wiping. The brackets and the metal portion of the flapping bearing may be cleaned using aircraft cleaning solvents. Page 401 Jun 02/16

33 [Blank Page]

34 INSPECTION / CHECK 1) Inspection / Check Inspect and repair brackets in accordance with Figure Inspect flapping bearing for evidence of cracked shims, tears, elastomer separation, shims touching, voids in elastomer or elastomer sheeting or extrusion and those limits found in Figure Inspect and repair flapping bearing in accordance with Figures and ) Airworthiness Limitations There are no maximum airworthiness lives assigned to the components listed below. 3) Scheduled Inspections Component Part Number Airworthiness Life Flapping Bearing LB Conditional Bracket Y Conditional A) 100 Hours and Annual: Visually inspect (without disassembly) tail rotor flapping bearing for evidence of cracked shims, tears, elastomer separation, shims touching, voids in elastomer or elastomer sheeting or extrusion. B) 2,500 Hour Inspection: The flapping bearing, P/N LB , and brackets, P/N Y , are to be inspected every 2,500 hours of operation in accordance with the inspection criteria found in paragraphs 1 and 3A. 4) Unscheduled Inspections A) After Hard Landing: If damage to fuselage structure, skid gear, or tailboom is such that a major repair, replacement or alignment is necessary, remove flapping bearing and brackets and conduct an inspection in accordance with paragraphs 1 and 3A. B) After Sudden Stoppage / Acceleration: If sudden stoppage/acceleration has occurred as defined by the applicable Bell 206 Maintenance Manual, remove and scrap flapping bearing and brackets. C) After Main Rotor Over Speed: If a main rotor over speed has occurred as defined by the applicable Bell 206 Maintenance Manual, remove flapping bearing and brackets and conduct an inspection in accordance with paragraphs 1 and 3. D) After Over Torque: If an over torque has occurred, visually inspect (without disassembly) tail rotor flapping bearing for evidence of cracked shims, tears, elastomer separation, shims touching, voids in elastomer or elastomer sheeting or extrusion. Refer to paragraphs 1 and 3 for allowable limits. Page 501 Jun 22/11

35 Type of Damage Mechanical and Corrosion Maximum Area per Full Depth Repair Number of Repairs Maximum Damage or Repair Depth inch before and after repair square inch 2 per segment Edge Chamfer to Remove Damage inch x 45 Cracks in Metal 0 Bores inch for ¼ circumference 1 Blue Coat Chips or Cracks Less than x Figure 500-1: Bracket Damage Limits Page 502 Jun 22/11

36 Figure 500-2: Flapping Bearing Elastomer Inspection Page 503 Jun 22/11

37 3 1 DESCRIPTION Trunnion Splines (Between Inch Diameter Pins) LOCATION MIN. INCHES MAX. INCHES ID Bearing Outer Member OD Overall Length Note: Use pins with one side ground flat to provide clearance between pins and root of spine teeth. Figure 500-3: Flapping Bearing Wear Limits Page 504 Jun 02/16

38 TYPE OF DAMAGE Mechanical and Corrosion Maximum Area per Full Depth Repair MAXIMUM DAMAGE OR REPAIR DEPTH inch before and after repair inch before and after repair sq. inch sq. inch Number of Repairs One Two per segment Edge Chamfer to Remove Damage inch Two per segment Cracks None allowed None allowed Blue Coat N/A Less than x Figure 500-4: Flapping Bearing Damage Limits Page 505 Jun 22/11

39 [Blank Page]

40 REPAIR Procedures in the REPAIR section contain criteria necessary for restoring the Isolator Assembly to serviceable condition. Repair procedures shall be limited to correction of minor defects or damage. Refer to Section 500 (INSPECTION / CHECK) to determine reparability. Bearings that exceed criteria noted in Section 500 (INSPECTION / CHECK) are to be returned to LORD Corporation. WARNNING: DO NOT CHANGE SURFACE FINISH, PART SHAPE OR EXCEED WEAR LIMITS. FAILURE TO COMPLY CAN RESULT IN PREMATURE FAILURE OF PART. Page 601 Jun 22/11

41 [Blank Page]

42 ASSEMBLY 1) Tail Rotor Hub Assembly (Reference Figures and 200-2) Assemble the tail rotor hub assembly using the following procedure. Note: If necessary, heat may be applied to the yoke to ease installation of flapping bearing. Do not allow flapping bearing to be exposed to heat higher than 160 F. When using heat, it is recommended to use a temperature indicator stick or calibrated optical pyrometer. A) Install flapping bearing (2) in yoke (1) and align dovetail grooves as shown in Figure 200-1, View A. B) Position brackets (3) in dovetail grooves of flapping bearing (2). Note: Bolt (6) length, amount of washers (5) and weights (4) will be determined during static balance in accordance with applicable Bell 206 Component Repair & Overhaul Manual and Illustrated Parts Breakdown. C) Install bolts (6) and washers (5) with only a few threads of the bolts engaged in the yoke. Do not torque bolts at this point. The bolts are used to keep the brackets aligned during the next step. D) Using a 4 c-clamp or larger as shown in Figure 200-2, slowly tighten c-clamp until brackets contact yoke. E) Torque bolts (6) 30 to 40 inch-pounds. F) Install tail rotor blades in accordance with applicable 206 Component Repair & Overhaul Manual. G) Perform static balance of the tail rotor hub and blade assembly (reference paragraph 2). 2) Static Balance Static balance of the tail rotor hub and blade assembly will be performed in accordance with the applicable Bell 206 Component Repair & Overhaul Manual; however, the following exceptions will apply during chord wise balance. A) When adding additional washers or weights to the bracket bolts, it will be necessary to loosen and add washers or weights to only one bolt at a time. Once the proper amount of weight has been determined, both bolts may be removed and the washers or weights can be distributed equally. B) Once the proper amount of balance weights has been installed under the bolts, torque bolts inch-pounds and lock wire. Tail rotor hub and blade assembly is now ready for installation. The requirements for installation and dynamic balancing of the tail rotor with the elastomeric flapping bearing are the same as for a conventional bearing. Page 701 Jun 02/16

43 [Blank Page]

44 FITS AND CLEARANCES [NOT APPLICABLE] Page 801 Jun 22/11

45 [Blank Page]

46 SPECIAL TOOLS, FIXTURES AND EQUIPMENT [NOT APPLICABLE] Page 901 Jun 22/11

47 [Blank Page]

48 ILLUSTRATED PARTS LIST 1. General Information A. The Illustrated Parts List (IPL) provides a breakdown of assemblies, subassemblies and detail parts of the isolator assemblies. All parts are listed, except for parts that lose their identities by being permanently fastened to other parts or are part of an assembly not subject to disassembly. B. Bulk materials such as safety or electrical wire and tape, and consumable materials such as adhesives, sealants, lubricants, solder, paint, and primer are not included in the Detailed Parts Lists. These materials are identified in the materials list at the beginning of each section. C. To find a part number when the part number is unknown, locate the part on the illustration and note the item number. Locate the item number on the Detailed Parts List. The part number will be shown on the same line. In some instances there are gaps in item number sequence and the item numbers are not continuously sequential. 2. Explanation of Columns, Terms and Symbols in the Illustrated Parts List (IPL) A. ITEM NO. The item numbers key the Details Parts List to the applicable illustration. The item number corresponds to an item number on the illustration. (1) An item number not on the illustration is identified by a dash (-) preceding the item number. This can indicate the following: (a) When two or more visually alike parts are listed in sequence, only the first part is illustrated. The illustration, however, is applicable to both parts. (b) When detail parts of an assembly or installation are separately illustrated, the resulting assembly may be illustrated as an assembly by bracketing the detail parts and identifying the bracket as the assembly. If brackets are not used, the detail parts are illustrated, but the assembly is not. (2) An item number followed by an alphabetical character such as A, B, C, etc. indicates the part listed is similar to the same item number without the alphabetical character. The difference could be each part is used for a different next higher assembly (NHA) or is an equivalent part. This will be noted in the NOMENCLATURE or EFF CODE columns. B. LORD PART NUMBER This column contains the original manufacturer s part number of the assembly, subassembly or detail part listed. Part numbers in the IPL are those of LORD Corporation, Erie, PA (76005) or are standard parts unless a Commercial and Government Entity (CAGE) code appears in the NOMENCLATURE column. Refer to paragraph 4 for details. The following phrases may be used in this column: (1) ORDER NHA is used when no part number exists for the part listed or when it is preferable to order an assembly rather than detail parts. ORDER NHA items that have no part numbers are not procurable and should not be ordered. The next higher assembly, however, is procurable and may be ordered. (2) NONPROC followed by an assigned number (for example NONPROC123) is used when no part number exists for the assembly. NONPROC assemblies are not procurable Page 1001 Jun 22/11

49 and may not be ordered. However, the detail parts of the assembly are procurable and may be ordered, unless otherwise specified. (3) REF followed by an assigned number (for example REF001) is used when the part number of the part is more than fifteen digits. The original part number with more than fifteen digits is listed in the NOMENCLATURE column and is the part number to be used when ordering the part. C. BELL PART NUMBER: This column is reserved for BELL part numbers and accommodates eleven numbers. D. NOMENCLATURE: This column identifies the parts being listed by noun name followed by modifiers when applicable. This column also provides the following information. (1) The relationship of each listed item to its next higher assembly (NHA) is shown by an indenture code. Each listed item is placed in the NOMENCLATURE column one indenture (one dot) to the right of the assembly to which it belongs. Items at equal indentures are all components of a single assembly or subassembly. An example of the indenture code system is shown below Assembly or Installation Descriptive Title Assembly Attaching Parts for Assembly Detail Parts for Assembly Subassembly Attaching Parts for Subassembly Detail Parts for Subassembly Sub-Subassembly Attaching Parts for Sub-Subassembly Detail Parts for Sub-Subassembly (2) Symbols used, with the exception of effectivity and CAGE codes, are as follows: (ATTACHING PARTS) Designates start of each group of attaching parts *----- Designates end of each group of attaching parts. (3) The following phrases may be used in this column: (a) DELETED identifies a part no longer used. (b) SUPERSEDED identifies a part no longer authorized for use. (c) REPLACES OR REPLACES ITEM XXX identifies this part is newer and therefore more desirable than the REPLACED part. However, either may be used. (d) REPLACED or REPL BY ITEM XXX identifies this part is older and therefore less desirable than the REPLACES part. However, either may be used. Page 1002 Jun 22/11

50 (e) ALTN PART FOR ITEM XXX identifies this part as an alternative. However, either part may be used and neither is more desirable than the other. (f) TPN precedes a True Part Number with all dashes, slashes, spaces and/or symbols assigned by the original manufacturer of the part. This is the part number to be used when ordering the part. E. EFF CODE: This column establishes part relationship with assemblies that are essentially the same, but have minor variations. These assemblies are the end items on the Detailed Parts List and are assigned reference letters such as A, B, C, D, etc. Subassemblies or detail parts that are not common to all configurations, but are associated with one or more of the coded end items, carry the letters assigned to the end item(s) with which they are associated. If a part is common to all end items, the EFF CODE column is blank. F. UNITS PER ASSY: This column shows the quantity of each item required for the next higher subassembly, assembly or installation outline. Quantities shown for attaching parts are the number required for the related part, subassembly or assembly and, therefore, may not be the total quantity used for the end item of the Detail Parts List. The following letters may be used in this column. (1) AR indicates, as required and refers to variable quantity items such as shims, spacers or similar items. (2) RF indicates reference and refers to items and their quantities which are listed elsewhere and are provided here as a reference only. 3. Abbreviations Standard abbreviations used in the IPL agree with ASME Y Commercial and Government Entity (CAGE) Codes A. CAGE codes, preceded by the capital letter V (V12345), are used to identify the original manufacturer of non LORD Corporation (V76005) components. CAGE codes are listed in the NOMENCLATURE column, except for the government codes below which are not listed. V96906 Military Standard (prefix MS) V88044 Army/Navy Standard (prefix AN) V80205 National Aircraft Standard (prefix NAS) B. The following CAGE codes are listed in this IPL. LORD Reference Designator Index (RDI) Not Applicable 6. Numeric Index (NI) Not Applicable 7. Overhauled Parts Return parts to LORD for overhaul. Page 1003 Jun 02/16

51 ITEM NO. LORD PART NUMBER ILLUSTRATED PARTS LIST BELL NOMENCLATURE PART NUMBER EFF CODE LB TAIL ROTOR FLAPPING BEARING KIT 1 5 LB BONDED MOUNTING 1 10 Y BRACKET 2 15 Y IDENTIFICATION PLATE 1 Figure LB Exploded View QTY/ ASSY Page 1004 Jun 02/16

52 ITEM NO. LORD PART NUMBER ILLUSTRATED PARTS LIST BELL NOMENCLATURE PART NUMBER LB TAIL ROTOR FLAPPING BEARING KIT EFF CODE 20 Y WEIGHT (Optional) 1 25 MS BOLT (Optional) 2 30 NAS1149DN832J WASHER (Optional) 4 35 MS21042L08 NUT (Optional) 2 40 Y DECAL 1 45 NAS6604D20 BOLT 1 50 NAS1149DO432K WASHER 2 55 MS14145L5 NUT 1 60 MS COTTER PIN 1 Figure LB Exploded View QTY/ ASSY Page 1005 Jun 02/16

53 [Blank Page]

54 SPECIAL PROCEDURES [NOT APPLICABLE] Page 1101 Jun 22/11

55 [Blank Page]

56 REMOVAL [SEE AIRCRAFT MAINTENANCE MANUAL] Page 1201 Jun 22/11

57 [Blank Page]

58 INSTALLATION [SEE AIRCRAFT MAINTENANCE MANUAL] Page 1301 Jun 22/11

59 [Blank Page]

60 SERVICING 1) SPARE PARTS / SUPPORT Spare Parts, Repair and Remanufacturing The following parts may be purchased directly from LORD Corporation. The LB flapping bearing is available as a replacement part on an exchange basis. Component Tail Rotor Flapping Bearing Kit Flapping Bearing Bracket MOD Plate Weight (Optional) Decal Part Number LB LB Y Y Y Y If spare parts, repair or manufacturing services are required, contact the following: LORD Corporation LORD Aerospace MRO Services 2455 Robison Road West Erie, PA Phone: Repairstation@lord.com 2) Technical Support Questions regarding the installation, use or maintenance of this kit should be directed to: LORD Corporation Customer Service 2455 Robison Road West Erie, PA Phone: APSupport@LORD.com Page 1401 Jun 02/16

61 [Blank Page]

62 STORAGE 1. Packaging and Storage Conditions A. Packaging Parts to be stored in original sealed packaging or in opaque, environmentally sealed packaging with desiccant. Parts should be packaged and stored in a relaxed position. B. Temperature Parts should be stored at room temperature defined as 72 F ± 9 F (22 C ± 5 C). Parts should not be stored at a temperature below 32 F (0 C) or above 100 F (38 C). C. Humidity Parts to be stored at minimum possible relative humidity and away from all sources of moisture. D. Light Parts to be stored away from light sources, such as sunlight and artificial light with high levels of ultra-violet content. E. Environment Parts to be stored away from degrading environments such as ozone and ozone generating equipment, fluids and fluid vapors deleterious to elastomerics such as solvents, oils, and greases, and harmful solids such as copper and manganese. Parts should also be stored away from sources of ionizing radiation. 2. Preservatives Do not apply preservatives or solvents to any part of the Isolator Assembly as it may adversely affect the function and/or life of the part. Page 1501 Jun 02/16

63 [Blank Page]

64 REWORK (SERVICE BULLETINS) [NOT APPLICABLE] Page 1601 Jun 22/11

65 [Blank Page] Page 1601 Jun 22/11