737 AMM 飞机维护手册 燃油 FUEL(58)

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(a)  Repair self-sealing rivets.
1)  Self-sealing rivets are used extensively in skin panels in the integral tank area. If a leak is discovered at a rivet, a permanent repair should be made by replacing the rivet. A temporary repair can be made by either: injecting sealant around the rivet with a locally obtained tool (Fig. 816); or injecting sealant around the rivet with a temporary repair tool (Fig. 817) and a rivet gun; or installing a click patch. Make a permanent repair the next time the tank is entered.
2)  The first method of temporary repair may be accomplished by forcing sealant into the fuel leak path from a position outside the tank, using locally fabricated tool. An adapter is cemented to the wing skin and sealant forced into the leak path by piston-like pressure exerted as a pressure bolt is turned.
3)  The second method used a fuel system self-sealing rivet temporary repair tool F70230 (Fig. 817) with a rivet gun supplying pressure required to force sealant around leaking rivet.
502 
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4)  The third method uses a Click Patch repair kit to temporarily repair fuel leaks through Class C (Heavy Seep). The kit is a one shot throw away and consists of solvent wipe, scotch brite pad, quick setting epoxy adhesive, spatula, mixing plate, a click patch, (either a flat disc for flush fasteners, or a hatted disc for protruding rivets or bolts), and an illustrated instruction sheet. All material for making repair is in kit. However, BAC 5010 Type 44 or Type 71 quick cure adhesive is preferred over that provided in kit.
CAUTION:  DO NOT USE TYPE 71 ON BARE METAL. CORROSION MAY RESULT.
Click Patch repairs are subject to the following restrictions:
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502  Application of Final Fillet 
Nov 15/77  Figure 814  28-11-0 
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Re-entrants Fillet and Dimensions of Full Bodied Fillet  502 
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502  Temporary Repair of Self-Sealing Rivets 
Nov 15/77  Figure 816  28-11-0 
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a)  Installation should only be accomplished after determination that there are
no structural cracks in the general area of the leak. b) Click Patch size limited to 1.25 inches in diameter. c) Click Patches are considered an interim repair and a permanent repair
must be made at next convenient opportunity.
(b)  Apply sealant to self-sealing rivets using locally fabricated tool for temporary repair (Fig. 802, 816).
NOTE: For fuel leaks at mechanically sealed rivets only.
1)  Clean surface of adapter using emery cloth if necessary.
2)  Strip paint from around leaking fastener. Clean surface with B01013 solvent, Series 93 (Ref AMM/SOPM 20-30-93). Do not touch surface with fingers after cleaning.
WARNING:  DO NOT GET SOLVENT IN MOUTH, EYES, OR ON SKIN. DO NOT BREATHE THE FUMES FROM SOLVENT. SOLVENTS ARE HAZARDOUS MATERIALS. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
3)  Using a cotton-tipped stick, apply a thin coat of Eastman 910 adhesive to bonding surface of adapter (Fig. 816, Step 1).
WARNING:  DO NOT ALLOW ADHESIVE TO BE IN CONTACT WITH THE SKIN, AS IT IS INJURIOUS TO SKIN.
4)  Center adapter over fastener and firmly press adapter against wing skin for 10 seconds. Release hold on adapter and allow it to stand for 15 minutes.
5)  Remove screw from loading port and back off bleed port screw until one more turn will remove it.
6)  Remove pressure bolt, allow any accumulated fuel to drain, and reinstall bolt approximately 12 turns (1/2 inch).
7)  Inject Class A-2 sealant in loading port until it exudes from bleed port (Step 3).
Tighten load and bleed screw.
8)  Tighten pressure bolt to 5 lb-in. and maintain for 5 minutes (step 4).
9)  Remove adapter by tapping side of adapter with a small hammer or mallet 
(step 5) and check rivet for leakage.
10)  Clean sealant from wing and adapter using B01013 solvent, Series 93 (Ref AMM/SOPM 20-30-93). Do not attempt to clean adhesive from wing surface; adhesive will weather off in 1 to 2 weeks.
(c)  Apply sealant to self-sealing rivets using a rivet gun for temporary repair. 1) Strip paint from around rivet leak, using emery cloth or an approved chemical paint remover. 2) Clean tool and surface of wing with B01013 solvent, Series 93 (Ref AMM/SOPM 20-30-93). Do not touch surface with fingers after cleaning. 3) Mark surface of wing to indicate position of temporary repair tool (Fig. 817)
　
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