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A
747-400 MAINTENANCE MANUAL
(6) S 865-128Make sure that all four nacelle anti-ice switches on the M7321 module are in the OFF position.
(7) S 865-129Put these switches on the P5 overhead panel in the OFF position: (a) AFT CARGO HT (b) PACKS 1 (c) PACKS 2 (d) PACKS 3
(8) S 865-152Make sure that the thrust reversers are stowed.
(9) S 865-130Put these switches on the P5 overhead panel in the open position: (a) L ISLN (b) R ISLN
S 215-131
(10)
Make sure that there are no foreign objects or obstructions in the engine precooler inlet or ram air inlets.
S 865-147
(11)
Clear all Chapter 36 EICAS status messages (AMM 45-10-00/201).
S 865-132
(12)
Put the applicable ENGINE BLEED switch on the P5 overhead panel to the ON position.
NOTE: Make sure the other three ENGINE BLEED switches are in
____ the OFF position.
S 865-170
(13)
Start the applicable engine (AMM 71-00-00/201).
(a)
Monitor the EICAS and the Bleed Air Control Module.
(b)
Make sure that the ENGINE BLEED SYS FAULT light does not come on during the engine start procedure.
(c)
Make sure that no Air Supply EICAS messages come into view during the engine start procedure.
S 865-134
(14)
Put the PACKS 2 switch on the P5 overhead panel in the ON position.
S 865-135
(15)
Put the APU VALVE switch on the P5 overhead panel in the OFF position.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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ALL ú ú 05 Page 503 ú Jun 10/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 865-136
(16)
Operate the engine at ground idle power.
S 715-137
(17)
Access the CMCS: 21 ECS, SUPPLY, MAINT PAGES (AMM 45-10-00/201).
(a)
Make sure that the L and R MANIFOLD DUCT PRESSURE displays show a stable pressure of more than 20 psig.
(b)
The pressures must agree (| 5 psi).
S 865-169
(18)
Put the wing isolation valve switch (L ISLN or R ISLN) for the wing opposite the applicable engine in the closed position (P5 overhead panel).
(a)
Make sure that the manifold duct pressure for the wing opposite of the applicable engine decreases to less than 5 psig.
NOTE: Cycle air driven pumps (ADP) 1 or 4, or pack 1 or 3
____
to speed up the bleed down process.
S 865-168
(19)
Put the wing isolation valve switch for the wing opposite the applicable engine in the open position.
(a)
Make sure that the L and R MANIFOLD DUCT PRESSURE displays show a stable pressure of more than 20 psig.
(b)
The pressures must agree (| 5 psi).
S 865-140
(20)
Put the ENGINE BLEED switch for the applicable engine in the OFF position.
(a)
Monitor the EICAS and ENGINE BLEED module.
(b)
Make sure that the ENGINE BLEED OFF light for the applicable engine comes on.
(c)
Make sure that the >BLEED X OFF (where X is 1, 2, 3, or 4, as applicable) message is on EICAS.
(d)
Make sure that the left and right manifold duct pressures decrease less than 5 psig.
(e)
Make sure that the ENGINE BLEED SYS FAULT light stays off.
S 865-141
(21)
Put the ENGINE BLEED switch for the applicable engine in the ON position.
(a)
Make sure that the ENGINE BLEED OFF light for the applicable engine goes off.
(b)
Make sure that the >BLEED X OFF (where X is 1, 2, 3, or 4, as applicable) message goes off EICAS.
(c)
Make sure that the ENGINE BLEED SYS FAULT light stays off.
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