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747-400 MAINTENANCE MANUAL
(2)
B00148 Solvent - Methyl Ethyl Ketone (MEK), TT-M-261
C.
Repair of O-rings
S 378-177
(1)
If the rubber seal on a tank access door has a leak, do one of these steps:
(a)
Replace the tank access door.
(b)
If the rubber seal is replaceable, do this task: Replacement of the Molded Rubber Door Seal.
S 378-178
(2)
If an O-ring on a fuel system component has a leak, do these steps to replace the O-ring:
(a)
Get the correct replacement O-ring.
(b)
Make sure the cure date of the replacement O-ring is less than 48 months ago.
(c)
Remove the used O-ring from the component.
WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON
_______ YOUR SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. SOLVENTS MAY BE FLAMMABLE OR HARMFUL TO THE ENVIRONMENT. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
(d)
Clean the O-ring groove and the flat surfaces that the O-ring is between with solvent, Series 93 (AMM 20-30-93/201).
(e)
Rub the surfaces dry with the clean gauze.
(f)
Examine the O-ring groove and the adjacent fuel surface for cuts, scratches, dents, distortions, and unwanted material.
(g)
Repair or replace all components that have leaks.
(h)
Examine the new O-ring to make sure it is in a good condition.
(i)
Discard the O-ring if it is not in a good condition.
(j)
Make a mark of the cure date on the component that you install the O-ring on.
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747-400 MAINTENANCE MANUAL
(k)
Make sure the O-ring has a good fit in the groove (Fig. 818).
(l)
Install the O-ring.
(m)
Assemble the component.
TASK 28-11-00-908-056
6. Replacement of the Molded Rubber Door Seal (Fig. 819)__________________________________________
A. General
(1)
You can use this procedure to replace all the rubber seals on high impact resistant access panels. All new type replacement cast aluminum access panels will also have molded rubber seals you can remove and replace.
B.
References
(1)
AMM 20-30-82/201, Airplane Structure Cleaning Solvents
C.
Standard Tools and Equipment
(1)
Water - Clean, tap
(2)
Air gun
(3)
Sealant gun
(4)
Sealant removal tool - wood or plastic
D.
Consumable Materials
(1)
A00413 Sealant - Adhesive, BMS 5-26
(2)
A00908 Sealant - Adhesive, Proseal 860, B 1/6
(3)
B00184 Solvent - Cleaning, BMS 11-7
(4)
B00349 Solvent - Methyl Ethyl Ketone TT-M-261
(5)
B00316 Naphtha - Aliphatic TT-N-95
(6)
G02167 Sandpaper - Scotchbrite
(7)
G00034 Cloth, Process Cleaning Absorbent Wiper (cheesecloth, gauze)
E.
Access
(1)
Location Zones
500 Left Wing
600 Right Wing
(2)
Access Panels 541AB thru 553KB Fuel Tank Access Door, Left 641AB thru 653KB Fuel Tank Access Door, Right
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400
MAINTENANCE MANUAL
A
Fuel Tank Access Panel Repair 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 燃油 FUEL 1(106)
