S 866-230
(27)
Make sure the voltage V2 is not less than the value, shown in the table above, corresponding to the voltage V1 measured.
S 866-231
(28)
Set the toggle switch on the G26001 squib test box to the OFF position.
S 866-232
(29)
If the A26002 is used, put the POWER switch to the OFF position on the test box.
S 866-233
(30)
Open these circuit breakers on P6 main power distribution panel and attach DO-NOT-CLOSE tags :
(a) 6H6, FIRE EXTINGUISHER LOWER CARGO
S 026-235
(31)
Disconnect the electrical connector, DM7908C, of bottle C from the G26001 test box.
S 026-236
(32)
If the A26002 is used, do the following:
(a)
Disconnect the electrical connector, DM7906C, of bottle A from the test box.
(b)
Disconnect the electrical connector, DM6742C, of bottle D from the A26002 test box.
S 866-189
(33) Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P180 DC power distribution panel:
(a)
180F4, E/E COOL VLV CONT
(b)
180H1, E6/E9 VLV PWR
S 866-101
(34) Do the "Put the Air/Ground Relay System back in the Ground Mode" task (AMM 32-09-02/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
26-23-05
ALL ú ú 01 Page 611 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 866-100
(35)
AIRPLANES WITH DUAL CARGO HEAT OR AFT CARGO AIR CONDITIONING; Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P180 DC power distribution panel:
(a) 180E9, CARGO VENT FLAPPER
G.
Squib Electrical Connection Procedure
NOTE: Do this procedure each time you connect an electrical connector to
____
a fire bottle squib.
S 436-116
(1) Do the steps that follow to connect an electrical connector to a fire bottle squib.
(a)
Open this circuit breaker on the P6 main power distribution panel and attach a DO-NOT-CLOSE tag: 1) 6H6, FIRE EXTINGUISHER LOWER CARGO
(b)
Remove the test equipment protective cover from the fire bottle squib.
WARNING: MAKE SURE THERE IS NO VOLTAGE AT THE ELECTRICAL CONNECTOR.
_______ IF THERE IS A VOLTAGE AT THE ELECTRICAL CONNECTOR, THE SQUIB CAN RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.
(c) Make sure there is no voltage between pins 1 and 2 of the electrical connector.
NOTE: If you use a voltmeter with a 10k ohm or greater
____ resistor, you will remove the stray voltage from the electrical connector.
(d)
Make sure the squib electrical pins are not bent or damaged.
(e)
Make sure the electrical connector is not damaged.
NOTE: If the squib electrical pins do not enter the
____ receptacles in the electrical connector, the pins can cause damage to the electrical connector.
(f)
Connect the electrical connector to the fire bottle squib.
(g)
Do the steps that follow to make sure you did not bend or damage the squib pins.
NOTE: This step is necessary because the pins are most likely
____ be damaged the first time an electrical connector is connected to the squib.
1) Disconnect the electrical connector from the fire bottle squib.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
26-23-05
ALL ú ú 01 Page 612 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
2) Make sure the squib electrical pins are not bent or
damaged. 3) Make sure the electrical connector is not damaged. 4) Connect the electrical connector to the fire bottls squib.
(h) Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P6 panel: 1) 6H6, FIRE EXTINGUISHER LOWER CARGO
H. Connect the Squib Connectors
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：747-400 AMM 飞机维护手册 防火 FIRE PROTECTION 2(142)
