28-11-00
ALL ú ú 01 Page 636 ú Sep 28/99
A
757 MAINTENANCE MANUAL
C. Find the Leaks at the Tank Access Doors
S 656-041
(1) Fill the applicable fuel tank to a level which will cover the tank access door that you think has a fuel leak (Table I).
NOTE: Data calculated at an airplane attitude of zero degree pitch,
____
zero degree roll.
~..........................................
| TABLE I |
| Fuel Necessary to Cover the Access Door |
............................................
| | FUEL NECESSARY TO |
| ACCESS DOOR | COVER THE ACCESS |
| | DOOR (LBS) |
............................................
| 134AZ | 3,500 |
| 531AB/631AB | 9,300 |
| 531BB/631BB | 14,700 |
| 531CB/631CB | 20,600 |
| 541AB/641AB | 200 |
| | |
| 541BB/641BB | 700 |
| 541CB/641CB | 1,300 |
| 541DB/641DB | 2,100 |
| 541EB/641EB | 3,200 |
| 541FB/641FB | 4,500 |
| | |
| 541GB/641GB | 5,600 |
| 541HB/641HB | 7,200 |
| 541JB/641JB | 8,600 |
| 541KB/641KB | 9,700 |
| 541LB/641LB | 10,800 |
| | |
| 541MB/641MB | 11,900 |
| 542AB/642AB | 13,000 |
| 542BB/642BB | 13,800 |
| 542CB/642CB | 14,400 |
| 542DB/642DB | 14,600 |
2...................…......................1
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28-11-00
ALL ú ú 01 Page 637 ú Sep 28/99
A
757 MAINTENANCE MANUAL
TASK 28-11-00-796-063
6. Leak Detection in the Dry Bay_____________________________
A. Equipment
(1)
B28008-10 or equivalent - Pressurization Equipment for Wing Dry Bay Fuel Leak Detection
(2)
Source - vacuum, 2.5 psi
B.
Access
(1)
Location Zones
541 Main Tank-Rib No. 5 to No. 17 (Left)
641 Main Tank-Rib No. 5 to No. 17 (Right)
C.
Find the Leaks in the Dry Bay
S 216-044
(1)
Look and find which of the four drain holes on the bottom of each wing has a leak in the area (Fig. 613).
S 286-045
(2)
Find which dry bay that the leak starts from.
NOTE: The fuel leak at a drain hole does not always correspond to
____ the dry bay that is the source of the fuel leak. The fuel leak can flow down a stringer and go out one of the other drain holes. Use the drain holes only as an aid to find where the source of a fuel leak is. For more information refer to AMM 28-11-07/601.
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