SD3-60 STRUCTURAL REPAIR MANUAL STABILIZER (FIN) - STRUCTURAL IDENTIFICATION

Transcription

1 SRM VERTICAL STABILIZER (FIN) STRUCTURAL IDENTIFICATION 1. General This section identifies the skin panels and structural components of the vertical stabilier. Details are given of specific location; material specifications and related commercial designations; material thicknesses, limits of allowable damage, and approved repairs. 2. Construction The fin is of conventional all metal construction with L/E, front and rear spars positioned at 7%, % and % chord respectively. The L/E spar consists of 2024T3 flat webs with 2024T3510 T section booms. The front and rear spar consists of 2024T3 flat webs and 2024T3510 boom angles. These spars are extended and locally reinforced with 7075T351 fail safe booms for attachment to the sloping bulkheads within the fuselage body. The rear spar stops at rib 11 to cater for the rudder horn but structural continuity is obtained through a channel section sub spar which continues stringers 4 between rib 11 and end rib. Ribs are identified by a numbering system and are positioned either horiontally or at 90 to the front spar and are intercostal with the spars. Except for the root rib, which has 2024T3 flat webs with boom angles forward and 2024T3510 boom angles aft of front spar, ribs are of material and consist of flanged diaphragms and stiffeners with cutouts and anticrack angles at stringer locations. Ribs 4 and 10 are reinforced with 7075T7351 foot fittings to carry the 7075T7351 fail safe hinge brackets which bolt to the rear spar. Rib 13 and tip rib have full aerofoil section and support the Kevlar fin tip. Stringers are material and are tophat section with the exception of stringer 1, 4 and 5 which have a 'Z' section above rib 5. Side skins are chemietched 2024T3 with a joint along rib 5 and the leading edge skin is heavy gauge 2024T3 as a protection against bird strike. The main fore and aft shear loads are transmitted to the fuselage through A K.S.I. shear pin housed in 7075T7351 retainer. The shrouds are of Kevlar construction supported with channels. 3. Structural Identification The following pages contain diagrams and text to define the components, skin materials and thicknesses, that comprise the vertical stabiliser. Page 1

2 SD360 STRUCTURAL REPAIR MANUAL G.A. of Vertical Stabiliser Figure 1 Page 2

3 ITEM NO. MATERIAL THICKNESS/ GAUGE PART NO. DESCRIPTION 1 SD G.A. of Fin 2 SD Rudder Assy Compete 3 SD G.A. Rudder Tab 4 SD Fin Tip Fairing 5 SD Installation of Dorsal Key to Figure 1 Page 3

4 SD360 STRUCTURAL REPAIR MANUAL G.A. of Fin Figure 2 Page 4

5 ITEM NO. MATERIAL THICKNESS/ GAUGE PART NO. DESCRIPTION 1 SD G.A. of Fin 2 SD Assy of Fin Structure 3 SD Skin Assy 4 SD Fin Tip Fairing 5 SD Horn Shroud Sub Assy 6 SD Horn Shroud Side Panel 7 SD Left Upper Shroud Panel 8 SD Right Upper Shroud Panel 9 SD Left Upper Nose Shroud 10 SD Right Upper Nose Shroud 11 SD Centre Shroud Sub Assy 12 SD Centre Shroud Side Panel 13 SD Lower Shroud Sub Assy 14 SD Lower Shroud Panel 15 SD L/E Skin Assy 16 SD Left Panel Upper Hinge 17 SD Right Panel Upper Hinge 18 SD Left Panel Lower Hinge 19 SD Right Panel Lower Hinge 20 SD Shear Pin Retainer Key to Figure 2 Page 5

6 SD360 STRUCTURAL REPAIR MANUAL Assy of fin structure Figure 3 Page 6

7 ITEM NO. MATERIAL THICKNESS/ GAUGE PART NO. DESCRIPTION 1 SD ASSY OF FIN STRUCTURE 2 SD ASSY OF 7% L/EDGE SPAR 3 SD ASSY OF FRONT SPAR 4 SD ASSY OF REAR SPAR 5 SD ASSY OF FIN SUB SPAR 6 SD ASSY OF ROOT RIB FWD 7 SD ASSY OF ROOT RIB AFT 8 SD ASSY OF RIB1 9 SD ASSY OF RIB 2 FWD 10 SD ASSY OF RIB 2 AFT 11 SD ASSY OF RIB 3 FWD 12 SD ASSY OF RIB 3 AFT 13 SD ASSY OF RIB 4 FWD 14 SD ASSY OF RIB 4 AFT 15 SD ASSY OF RIB 5 FWD 16 SD ASSY OF RIB 5 AFT 17 SD ASSY OF RIB 6 FWD 18 SD ASSY OF RIB 6 AFT 19 SD ASSY OF RIB 7 FWD 20 SD ASSY OF RIB 7 AFT 21 SD ASSY OF RIB 8 FWD 22 SD ASSY OF RIB 8 AFT 23 SD ASSY OF ASSY OF RIB 9 FWD 24 SD ASSY OF ASSY OF RIB 9 AFT 25 SD ASSY OF RIB 10 FWD 26 SD ASSY OF RIB WAFT 27 SD ASSY OF RIB QQA250/5 2024T3.050" DOUBLER Key to Figure 3 Page 7

8 SD360 STRUCTURAL REPAIR MANUAL ITEM NO. MATERIAL THICKNESS/ GAUGE PART NO. DESCRIPTION 29 S ASSY OF RIB 12 FWD 30 QQA250/5.025" ASSY OF RIB 12 AFT 31 SD ASSY OF RIB 13 FWD 32 QQA250/5.025" ASSY OF RIB 13 CENTRE 33 SD ASSY OF RIB 13 AFT 34 QQA250/5.050" ASSY OF TIP RIB FWD 35 ASSY OF TIP RIB AFT 36 QQA " DIAPHRAGM 37 QQA250/5.032" SUPPORT BKT.SHROUD 38 QQA250/5.032" DOUBLER 2024T3 39 QQA250/5.032" SUPPORT BRACKET 40 QQA250/5.032" MTG DIAPHRAGM LWR SHROUD 41 QQA250/5.032" MTG CHANNEL LWR SHROUD Key to Figure 3 (Continued) Page 8

9 Fin skin assy Figure 4 (Sheet 1) Page 9

10 SD360 STRUCTURAL REPAIR MANUAL Side skin panels Figure 4 (Sheet 2) Page 10

11 ITEM NO. MATERIAL THICKNESS/ GAUGE PART NO. DESCRIPTION 1 SD SKIN ASSEMBLY 2 SD SKIN & STRINGER ASSY LOWER SD SD SD SKIN & STRINGER ASSY UPPER 4.032" QQA250/5 STRINGERS UPPER 5.032" QQA250/5 RABBIT STRIPS 6.032" QQA250/5 RABBIT STRIPS 2024T " QQA250/5 STRINGERSLOWER 8.050" QQA250/5 RABBIT STRIPS 9.050" QQA250/5 RABBIT STRIPS 2024T " QQA250/5 BUTTSTRAPS 2024T " QQA250/5 FIN SKINUPPER 2024T " QQA250/5 FIN SKINLOWER 2024T " QQA250/5 WEDGET/EDGE " QQA250/5 2024T351 STRAPS FAIL SAFE Key to Figures 4 Page 11

12 SRM VERTICAL STABILISER ALLOWABLE DAMAGE 1. General The following pages define the allowable damage limitations for the aircraft vertical stabiliser. The limitations are given in tabular form as follows: Vertical Stabiliser Skins. Refer to Table 101. Vertical Stabiliser Spar Web and Rib Web. Refer to Table 102. Definitions of types of damage. Refer to , pb1. Page 101

13 TYPE OF DAMAGE 'D' MAX DEPTH 'L' LENGTH MIN EDGE DIST INCHES MIN DIM FROM LINES OF FASTENERS OTHER LIMITATIONS REMEDIAL ACTION REQUIRED Isolated Dents (1) Basic skin (2) Basin skin and doubler Gouges, nicks, scratches and surface corrosion (1) Basic skin (2) Basic skin and doubler 1.50 x ts 1.50 x td 0.10 x tb 0.10 x tb 10D min 10D min 0.50 max 0.50 max Dents smooth and free from cracks For skin with bonded doubler no delamination is allowed. No dents allowed in skins at rib stations along spar flanges or stringers. Must not extend over more than two adjacent fasteners, except where damage does not exceed depth of cladding. If beyond limits repair is required. Clean up damage Refer to , pb1. If beyond limits repair is required. Punctures Repair is required. Cracks Repair is required. SD360 STRUCTURAL REPAIR MANUAL owable damage Vertical stabiliser skin Table 101 Page 102 NOTE: ts = thickness of skin td = thickness of doubler

14 TYPE OF DAMAGE 'D' MAX DEPTH 'L' LENGTH MIN EDGE DIST INCHES MIN DIM FROM LINES OF FASTENERS OTHER LIMITATIONS REMEDIAL ACTION REQUIRED Isolated Dents (1) Spar web (2) Rib web Nicks, scratches, surface corrosion and abrasions (1) Spar web (2) Rib web 1.50 x ts 2.00 x tr 0.10 x ts 0.10 x tr 10D min 10D min 0.50 max 0.50 max Dents smooth and free of cracks. Must not extend over more than two adjacent fasteners, except where damage does not exceed depth of cladding. If beyond limit repair is required. Clean up damage Refer to , pb1. If beyond limits repair is required. Punctures Repair is required. Cracks (a) Radiating from lightening holes (b) Radiating from bend relief (c) Others Refer to , pb1. Refer to , pb1. Repair is required. SD360 STRUCTURAL REPAIR MANUAL Page 103 owable damage Vertical stabiliser Spar web and rib web Table 102

15 SRM VERTICAL STABILISER (FIN) REPAIRS 1. General The following pages contain details of approved repairs to the vertical stabiliser. Reference must also be made to CHAPTER 51, for further information regarding structural damage and repair practices of a general nature. It is to be noted that due to the similarity in construction of the Vertical and Horiontal Stabilisers, some of the approved repairs are applicable to both assemblies. CAUTION: THESE REPAIRS MAY AFFECT THE FATIGUE CRITICAL BASELINE STRUCTURE. REFER TO FOR FURTHER INFORMATION ON FCBS AND PROCEDURES TO BE FOLLOWED, PRIOR TO INCORPORATING ANY OF THESE REPAIRS. 2. List of approved repairs for Vertical Stabiliser. Skin Repairs patches. Refer to , Figure 201. Skin Repair. Refer to , Figure 202. Stringer Repairs. Refer to, Figure 201. Leading Edge Repair, Fin. Refer to , Figure 202. Typical Rib Repairs. Refer to , Figure 205. Fin Butt Strap Loose Rivets. Refer to Figure 203. Rear Spar on Fin. Refer to Figure 204. Alternative materials. Refer to , pb1. Alternative fasteners. Refer to , pb1. Page 201 Feb 01/10

16 SD360 STRUCTURAL REPAIR MANUAL Stringer repairs Figure 201 Page 202

17 Leading Edge Repairs Fin Figure 202 Page 203

18 SD360 STRUCTURAL REPAIR MANUAL Repair to Fin Buttstraps in way of Loose Riveting Figure 203 Page 204

19 Repair to R/Spar, Fin (Lower shroud mounting) Figure 204 Page 205