28-11-00
ALL ú ú 01 Page 802 ú Dec 20/95
A
757 MAINTENANCE MANUAL
(b)
Fully clean the channel.
(c)
Fill the channels fully with sealant.
TASK 28-11-00-208-031
3. Make an Analysis of the Causes of the Fuel Leaks________________________________________________
A. General
(1)
The causes of most of the fuel leaks in the fuel tank structure are:
(a)
Surfaces are prepared incorrectly
(b)
Sealants are mixed or kept incorrectly
(c)
Sealants are applied incorrectly
(d)
Fasteners are loose
(e)
Fittings and connections are installed incorrectly.
(2)
This task lists the causes of the fuel leaks.
B.
Access
(1)
Location Zones
133 Wing Center Section (Left)
134 Wing Center Section (Right)
531 Center Wing Tank (Left)
541 Main Tank - Rib No. 5 to No. 17 (Left)
542 Main Tank - Rib No. 17 to No. 21 (Left)
543 Surge Tank - Rib No. 21 to No. 23 (Left)
631 Center Wing Tank (Right)
641 Main Tank - Rib No. 5 to No. 17 (Right)
642 Main Tank - Rib No. 17 to No. 21 (Right)
643 Surge Tank - Rib No. 21 to No. 23 (Right)
C.
Procedure - The Causes of Fuel Leaks
S 288-002
(1)
Surfaces are prepared incorrectly.
(a)
The surfaces must not contain unwanted materials such as grease, metal particles, hair, loose paint or wax.
(b)
Unwanted materials can cause the sealant not to bond correctly.
S 288-003
(2)
Sealants are mixed or kept incorrectly.
(a)
Synthetic rubber makes the base for most sealing compounds. The manufacturer adds ingredients to control strength, cure time, plasticity, usable life, and fuel resistance.
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本文鏈接地址：757 AMM 飛機維護手冊 燃油 CHAPTER 28 - FUEL 1(115)
