S 864-030
(4)
Make sure the crossfeed valve(s) are closed.
S 654-003
(5)
Drain and purge the center fuel tank (AMM 28-11-00/201).
S 014-004
(6)
To remove the discharge check valve of the fuel boost pumps, remove the applicable center tank access door, 531AB or 631AB (AMM 28-11-02/401).
S 014-005
(7)
To remove the discharge check valve of the fuel override pumps, remove the center tank access door, 134AZ (AMM 28-11-02/401).
S 944-027
WARNING: OBEY THE FUEL TANK ENTRY PRECAUTIONS (AMM 28-11-00/201).
_______ FAILURE TO OBEY THE FUEL TANK ENTRY PRECATUIONS COULD CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(8)
Obey the fuel tank entry precautions (AMM 28-11-00/201).
S 014-006
(9)
To remove the discharge check valves of the fuel override pumps, remove the baffle doors, 134BZ, 134CZ, and 134DZ (AMM 06-41-00/201).
S 034-009
(10)
Remove the nut (17), the ring (15), and the O-ring (16) at the pressure sensor line (1).
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28-22-09
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757
MAINTENANCE MANUAL
S 034-010
(11) Remove the four screws (6), the washers (3), the nuts (2) and one O-ring (5) from the valve flange (4).
NOTE: This disconnects the discharge check valve (8) from
____
the pump discharge line (7).
S 034-011
(12)
Remove the four bolts (24), washers (11), and nuts (10) from the discharge check valve (8).
S 024-012
(13)
Remove the discharge check valve (8).
S 034-013
(14)
Remove the O-ring (14).
TASK 28-22-09-404-014
3. Install the Discharge Check Valve (Fig. 401)
_________________________________
A. Parts
~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 2 | Nut | 28-22-03 | 02 | 255 | | | 3 | Washer | | | 250 | | | 5 | O-ring | | | 265 | | | 6 | Screw | | | 240,245 | | | 8 | Discharge Check Valve | 28-22-03 | 03 | 625 | | | 10 | Nut | | | 675 | | | 11 | Washer | | | 77,670 | | | 14 | O-ring | | 01 | 685 | | | 15 | Ring | | | 255 | | | 16 | O-ring | | | 260 | | | 17 | Nut | | | 250 | 2......…........…...................................…..........….....….........1
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本文链接地址：757 AMM 飞机维护手册 燃油 CHAPTER 28 - FUEL 3(90)
