9. ELECTRICAL CONNECTOR
ENGINE FIRE EXTINGUISHER BOTTLE (EXAMPLE)
A
Engine Fire Extinguisher Bottle Installation
Figure 401
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747-400 MAINTENANCE MANUAL
S 014-060
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 HYDRAULIC POWER REMOVED, THE FLAPS WILL
MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP
CONTROL LEVER. INJURY TO PERSONS CAN OCCUR.
(1) Extend the wing leading edge flaps to get access to the fire extinguisher bottles (AMM 27-81-00/214).
S 494-003
WARNING:_______MAKE SURE YOU INSTALL LOCKS IN THE FLAPS. THE FLAPS WILL RETRACT IN 7 SECONDS AND INJURY TO PERSONS CAN OCCUR.
(2)
Install safety locks on all extended leading edge flaps where persons are near (AMM 27-81-00/201).
S 864-004
(3)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(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 034-005
(4) Disconnect the electrical connectors (9) from the bottle squibs. ~....................................................... | BOTTLE | ELECTRICAL CONNECTOR | ......................................................... | LEFT BTL A ENG 1 SQUIB | DM228C | ......................................................... | LEFT BTL A ENG 2 SQUIB | DM228B | ......................................................... | LEFT BTL B ENG 1 SQUIB | DM229C | ......................................................... | LEFT BTL B ENG 2 SQUIB | DM229B | ......................................................... | RIGHT BTL A ENG 3 SQUIB | DM230B | ......................................................... | RIGHT BTL A ENG 4 SQUIB | DM230C | ......................................................... | RIGHT BTL B ENG 3 SQUIB | DM231B | ......................................................... | RIGHT BTL B ENG 4 SQUIB | DM231C | 2.............................….........................1
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747-400 MAINTENANCE MANUAL
S 434-066
WARNING:_______ PUT A PROTECTIVE COVER ON THE FIRE BOTTLE SQUIB. IF YOU DO NOT
PUT A PROTECTIVE COVER ON THE FIRE BOTTLE SQUIB, THE FIRE
BOTTLE CAN RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO
PERSONS.
CAUTION:_______ DO NOT PUT A SHUNT PLUG ON THE FIRE BOTTLE SQUIB. THE SHUNT
PLUG CAN CAUSE DAMAGE TO THE SQUIB PINS.
(5)
Put a protective cover on the fire bottle squib.
S 034-073
(6)
Disconnect the electrical connector (1) from the bottle pressure switches. ~...................................................... | BOTTLE | ELECTRICAL CONNECTOR | ........................................................ | LEFT BTL A PRESSURE SWITCH | DM228A | ........................................................ | LEFT BTL B PRESSURE SWITCH | DM229A | ........................................................ | RIGHT BTL A PRESSURE SWITCH | DM230A | ........................................................ | RIGHT BTL B PRESSURE SWITCH | DM231A | 2..............................….......................1
S 034-007
(7)
Remove the ground strap (5) from the bottle ground lug (6).
S 034-008
(8)
Disconnect the discharge hose at the discharge port (4).
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