SD3-60 STRUCTURAL REPAIR MANUAL AND TABS - STRUCTURAL IDENTIFICATION

Transcription

1 SRM ELEVATORS AND TABS - STRUCTURAL IDENTIFICATION 1. General This section identifies the skin panels and structural components of the elevators, trim tabs and spring tabs. Details are given of: specific location; material specifications and related commercial designations; material thicknesses; limits of allowable damage; and approved repairs. 2. Construction The elevators are of all metal construction consisting of a main and intermediate spar of full length with a leading edge spar broken at the hinge positions and a trailing edge spar broken in way of the tab horn. spars are self flanged 2024-T42 material. A 2024-T42 lipped angle stringer is located between the leading edge and main spars at both top and bottom surfaces. Ribs are perpendicular to and intercostal with the spars and are self-flanged 2024-T42. Forward of the front spar the ribs have cut-outs to cater for the stringers. Top, bottom and nose skins are chemi-etched 2024-T3 material with the nose skins housing the internal mass balance weights which extend over their entire length. Fail safe 7075-T7351 tab hinge brackets are attached to the main spar. The elevator tab is of similar construction to the rudder tab (Refer to , pb1.) 3. Structure Identification The following pages contain diagrams and text to define the components, skin materials and thicknesses that comprise the Elevators and Tabs. Page 1

2 Elevator structure Figure 1 Page 2

3 ITEM NO. MATERIAL THICKNESS/ GAUGE PART NO. DESCRIPTION SD ASSY L/E SPAR OUT/BD SD SD ASSY L/E SPAR CENTRE SD SD ASSY L/E SPAR IN/BD SD SD ASSY T/E SPAR IN/BD SD ASSY T/E SPAR CENTRE SD ASSY INTERMEDIATE SPAR SD STRINGER ASSY IN/BD SD SD RIB ASSY IN/BD SD SD SUB SPAR RIB ASSY IN/BD SD RIB ASSY OUT/BD SD SD ASSY HINGE RIB OUT/BD SD SD ASSY HINGE RIB IN/BD SD SD HINGE BRACKET ASSY SD SD SUPPORT RIB ASSY SD SD LANDING PLATE ASSY SD SD LANDING PLATE ASSY SD SD INTERMEDIATE RIB ASSY 18 QQ-A-225/ " - WEDGE TRAILING EDGE T QQ-A-250/ " - MAIN SPAR T42 20 QQ-A-250/5 T " - SUB SPAR IN/BD Key to Figure 1 Page 3

4 ITEM NO. MATERIAL THICKNESS/ GAUGE 21 QQ-A-250/ " - RIB T42 22 QQ-A-250/ " - RIB T SD ASSY T/E SPAR IN/BD NOTE: Item 4 applies SH3601 thru SH3619 only. Item 23 applies SH3620 & Subs. PART NO. Key to Figure 1 DESCRIPTION Page 4

5 Elevator Skinning Figure 2 Page 6

6 ITEM NO. MATERIAL THICKNESS/ GAUGE " QQ-A-250/ T " QQ-A-250/ T " QQ-A-250/ T " QQ-A-250/ T3 PART NO. DESCRIPTION TOP SKIN BOTTOM SKIN NOSE L/EDGE SKIN ACCESS PANEL Key to Figure 2 Page 7

7 Elevator tab Figure 3 Page 8

8 ITEM NO. MATERIAL THICKNESS/ GAUGE PART NO. DESCRIPTION SD L/E ASSY - BONDED SD QQ-A-250/ " - SKIN 2024-T3 3 QQ-A-250/ " - SPAR CHANNEL 2024-T42 4 AEROWEB - - HONEYCOMB CORE A QQ-A-250/ " - LEADING EDGE 2024-T42 6 QQ-A-250/ " - REINFORCING STRIP 2024-T T ELEV. TAB DRIVE BKT T ELEV. TAB MASTER HNG T ELEV. TAB HINGE 10 QQ-A-250/ " - COVER BKT (BAL.WT) 2024-T42 11 QQ-A-250/ " - COVER BAL WEIGHT 2024-T42 12 G.E.C. HEAVY 0.25" - BALANCE WEIGHT ALLOY 13 L " - BALANCE WEIGHT 14 S " - BALANCE WEIGHT Key to Figure 3 Page 9

9 SRM ELEVATORS AND TABS - ALLOWABLE DAMAGE 1. General The following pages define the allowable damage limitations for the aircraft Elevators and Tabs. The limitations are given in tabular form as follows: - Elevator Skin. Refer to Table Elevator Leading Edge Skin. Refer to Table Elevator Spar Web and Rib Web. Refer to Table 103. Definitions of types of damage. Refer to , pb1. Page 101

10 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) Basic 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 ts 0.10 x td 10D min. 10D min max max Dents smooth and free of cracks. For skin with bonded doubler no delaminations allowed. No dents allowed in skin at rib stations, along spar flanges or on stringer. 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. owable damage - Elevator skin Table 101 Page 102 NOTE: ts = thickness of skin tk = thickness of doubler

11 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 1.00 x tl 10D min Dents smooth and free from cracks. No dents allowed in skin at rib station or along spar flanges Gouges, nicks, scratches and surface corrosion x tl 0.50 max. - - 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. owable damage - Elevator leading edge skin Table 102 NOTE: tl = thickness of leading edge skin Page 103

12 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 1.00 x tr 0.10 x ts 0.10 x tr 10D min. 10D min max max Dents smooth and free from cracks. Not to 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 (a)radiating from lightening holes (b)other cracks owable damage - Elevator spar web and rib web Table 103 (a) Repair. Refer to , pb1. (b) Repair is required. Page 104 NOTE: ts = thickness of skin tr = thickness of rib.

13 SRM ELEVATOR AND TRIM TABS - REPAIRS 1. General The following pages contain details of approved repairs to the elevator and trim tabs. 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 Elevator to the Horiontal Stabiliser, 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 Elevators and Trim Tabs Skin Repairs - Patches. Refer to , Figure 201. Skin Repair. Refer to , Figure 202. Stringer Repairs. Refer to , Figure 203. Trailing Edge Repairs. Refer to , Figure 204. Typical Rib Repairs. Refer to , Figure 205. Leading Edge Repair. Refer to , Figure 206. Replacement of Elevator Tab Inbd Hinge Bracket, and Hinge Bearing Sub Assembly. Refer to Figure Alternative fasteners. Refer to , pb1. - Alternative Materials. Refer to , pb1. Information regarding the repainting of the aircraft following repairs to the structure. Refer to , pb1. CAUTION: REPAINTING OF CONTROL SURFACES MAY IN SOME CASES NECESSITATE REBALANCING. REFER TO , PB1. As a guide, light sanding prior to a single spray coat would not require surfaces to be rebalanced. Overspraying or additional spraying will require balance to be verified. Page 201 Feb 01/10

14 Replacement of Elevator Tab Inbd Hinge Bracket & Hinge Bearing Sub Assy Figure 201 Page 202

15 SRM ELEVATOR AND ELEVATOR TAB - INSPECTION/CHECK 1. Check wear limits at hinge points Tabulated data of in-service wear limits for the elevator and elevator tab hinge points are presented as follows: - Elevator inboard hinge. Refer to Figure Elevator outboard Hinge. Refer to Figure Elevator tab outboard hinge. Refer to Figure 603 (Sheet 1). - Elevator tab inboard hinge. Refer to Figure 604 (Sheet 1). Page 601

16 Elevator Inboard Hinge Figure 601 Page 602

17 FIG. 601 REF. LTR A B C D E F G ITEM No. OD 1 ID 2 OD 3 ID 4 OD4 ID 5 OD 2 ID 3 OD 2 ID 7 OD 7 ID 6 OD 2 ID 10 ORIGINAL MANUFACTURING LIMITS DIMENSION lnches ASSEMBLY CLEARANCES IN-SERVICE WEAR LIMITS DIMENSION LIMITS MIN. MAX. MIN. MAX. MIN. MAX ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) (0.3175) (0.0203) ( ) (0.0000) (0.0000) ( ) (0.0000) (0.7493) ( ) (0.0254) (0.0254) ( ) (0.0254) ( ) ( ) ( ) ( ) ( ) Elevator Inboard Hinge, Table of Fits and Clearances Table 601 (Sheet 1) ( ) ( ) ( ) ( ) ( ) MAX. ALLOW. CLEAR CE (mm) (0.1016) (0.0508) (0.0508) (0.0508) Page 603

18 FIG. 601 REF. LTR H J ITEM No. OD 10 ID 9 OD 9 ID ( ) ( ) ( ) ( ) ORIGINAL MANUFACTURING LIMITS DIMENSION lnches ( ) ( ) ( ) ( ) ASSEMBLY CLEARANCES (0.0203) ( ) ( ) ( ) ( ) IN-SERVICE WEAR LIMITS DIMENSION LIMITS MIN. MAX. MIN. MAX. MIN. MAX. Elevator Inboard Hinge, Table of Fits and Clearances Table 601 (Sheet 1) (Continued) ( ) ( ) MAX. ALLOW. CLEAR CE (mm) (0.1016) Page 604

19 Elevator Outboard Hinge Figure 602 Page 605

20 FIG. 602 REF. LTR A B C D E F G ITEM No. OD 1 ID 2 OD 3 ID 4 OD4 ID 5 OD 2 ID 3 OD 2 ID 7 OD 7 ID 6 OD 2 ID 10 ORIGINAL MANUFACTURING LIMITS DIMENSION lnches ASSEMBLY CLEARANCES IN-SERVICE WEAR LIMITS DIMENSION LIMITS MIN. MAX. MIN. MAX. MIN. MAX ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) (0.3175) (0.0203) ( ) (0.0000) (0.0000) ( ) (0.0000) (0.7493) ( ) (0.0254) (0.0254) ( ) (0.0254) ( ) ( ) ( ) ( ) ( ) Elevator Outboard Hinge, Table of Fits and Clearances Table ( ) ( ) ( ) ( ) ( ) MAX. ALLOW. CLEAR CE (mm) (0.1016) (0.0508) (0.0508) (0.0508) Page 606

21 FIG. 602 REF. LTR H J ITEM No. OD 10 ID 9 OD 9 ID ( ) ( ) ( ) ( ) ORIGINAL MANUFACTURING LIMITS DIMENSION lnches ( ) ( ) ( ) ( ) ASSEMBLY CLEARANCES (0.0203) ( ) ( ) ( ) ( ) IN-SERVICE WEAR LIMITS DIMENSION LIMITS MIN. MAX. MIN. MAX. MIN. MAX. Elevator Outboard Hinge, Table of Fits and Clearances Table 602 (Continued) ( ) ( ) MAX. ALLOW. CLEAR CE (mm) (0.1016) Page 607

22 Elevator Tab Outboard Hinge Figure 603 (Sheet 1) Page 608

23 FIG. 603 REF. LTR A B C D E F ITEM No. OD2 ID 5 OD 1 ID 2 OD4 ID 3 OD 1 ID 4 OD 1 ID 6 OD 1 ID 5 ORIGINAL MANUFACTURING LIMITS DIMENSION lnches ASSEMBLY CLEARANCES IN-SERVICE WEAR LIMITS DIMENSION LIMITS MIN. MAX. MIN. MAX. MIN. MAX (9.4920) (9.5250) ( ) ( ) (9.5098) (9.5479) (6.3729) ( ) ( ) (6.3729) (6.3729) (0.0152) (0.0127) ( ) (0.0000) (0.0127) (0.0127) (0.0559) ( ) (0.0381) (9.4920) (9.5250) Elevator Tab Outboard Hinge, Table of Fits and Wear Limits Table (9.5098) (9.5479) (6.3729) (6.3729) (6.3729) MAX. ALLOW. CLEAR CE (mm) (0.0559) (0.0381) Page 609

24 Elevator Tab Inboard Hinge Figure 604 (Sheet 1) Page 610

25 FIG. 604 REF. LTR A B C D E F ITEM No. OD 6 ID 2 OD 6 ID 1 OD 6 ID 3 OD3 ID 4 OD 6 ID 5 OD 5 ID 2 ORIGINAL MANUFACTURING LIMITS DIMENSION lnches ASSEMBLY CLEARANCES IN-SERVICE WEAR LIMITS DIMENSION LIMITS MIN. MAX. MIN. MAX. MIN. MAX ( ) ( ) (9.4920) (9.5250) (6.3729) (6.3729) ( ) ( ) (6.3729) (9.5098) (9.5479) (0.0127) (0.0127) (0.0000) ( ) (0.0127) (0.0152) (0.0381) ( ) (0.0559) (9.4920) (9.5250) (6.3729) (6.3729) (6.3729) (9.5098) (9.5479) MAX. ALLOW. CLEAR CE (mm) (0.0381) (0.0559) Page 611