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 S 864-136
 (25) Push and hold the manual override pressure switch, or insert the hex key into the bottle pressure switch cam and turn the key with a maximum of 5.7 pound-inch on the left bottle.
 (a)  Make sure the Bottle A discharge ENG 3&4 light on the P5 panel comes on.
 S 864-137
 (26) Push and hold the manual override pressure switch, or insert the hex key into the bottle pressure switch cam and turn the key with a maximum of 5.7 pound-inch on the right bottle.
 (a)  Make sure the Bottle B discharge ENG 3&4 light on the P5 panel comes on.
 S 864-138
 (27)
 Release the manual override pressure switch, or the hex key.

 S 864-142

 (28)
 Close this circuit breaker:

 (a)  P6 Main Power Distribution Panel 1) 6H2 FIRE EXTINGUISHER 1&3 A
 S 864-143
 (29) Push and hold the TEST 1 button on the, M7327, squib test module on the, P461, pilot's overhead maintenance panel.
 (a)  
Make sure the ENG 1, and 3 lights come on.

 (b)  
Make sure the ENG 2 and 4 lights do not come on.

 S 864-144
 (30) Release the TEST 1 button.
 (a)  Make sure the ENG 1 and 3 lights go off.
 S 864-145
 (31) Push and hold the TEST 2 button on the, M7327, squib test module on the P461 panel.
 (a)  
Make sure the ENG 1 and 3 lights come on.

 (b)  
Make sure the ENG 2 and 4 lights do not come on.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 864-146
 (32) Release the test button.
 (a)  Make sure the ENG 1 and 3 lights go off.
 S 864-147
 (33) Open this circuit breaker:
 (a)  P6 Main Power Distribution Panel
 1) 6H2 FIRE EXTINGUISHER 1&3 A

 S 864-148
 (34) Close this circuit breaker:
 (a)  P6 Main Power Distribution Panel
 1) 6H3 FIRE EXTINGUISHER 2&4 B

 S 864-307
 (35) Push and hold the TEST 1 button on the, M7327, squib test module on the, P461, pilot's overhead maintenance panel.
 (a)  
Make sure the ENG 2 and 4 lights come on.

 (b)  
Make sure the ENG 1 and 3 lights do not come on.

 S 864-310
 (36) Release the TEST 1 button.
 (a)  Make sure the ENG 2 and 4 lights go off.
 S 864-308
 (37) Push and hold the TEST 2 button on the, M7327, squib test module on the P461 panel.
 (a)  
Make sure the ENG 2 and 4 lights come on.

 (b)  
Make sure the ENG 1 and 3 lights do not come on.

 S 864-309
 (38) Release the test button.
 (a)  Make sure the ENG 2 and 4 lights go off.
 S 864-150
 (39) Close these circuit breakers:
 (a)  P6 Main Power Distribution Panel
 1) 6H1 FIRE EXTINGUISHER ENG 1&3 B
 2) 6H2 FIRE EXTINGUISHER ENG 1&3 A
 3) 6H3 FIRE EXTINGUISHER ENG 2&4 B
 4) 6H4 FIRE EXTINGUISHER ENG 2&4 A

 S 864-151
 (40) Push the TEST 1 and TEST 2 switches at the same time.
 (a)  Make sure the ENG 1, 2, 3 and 4 lights do not come on.
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 ALL  ú ú 01 Page 416 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 154-152
 WARNING:_______REFER TO AMM 27-81-00/201 FOR THE LOCK REMOVAL PROCEDURES. THE FLAPS WILL RETRACT IN SEVEN SECONDS, AND CAN INJURE PERSONNEL.
 (41) Remove the safety locks for the leading edge flap
 (AMM 27-81-00/201).

 S 864-321
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH THE HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER.
　
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