S 974-206
(5)
Make a record of the voltage shown on the multimeter (V1).
S 864-207
(6)
Set the toggle switch on the squib test box to ON.
S 974-208
(7)
Make a record of the voltage shown on the multimeter (V2).
(a) For voltage V1 in the range shown, make sure that voltage V2 is greater than or equal to the value shown in the cargo bay test voltage table
CARGO BAY TEST VOLTAGES ____________V1 V2
30.0 - 32.0 20.0
28.0 - 29.99 18.6
26.0 - 27.99 17.0
24.0 - 25.99 15.8
22.0 - 23.99 14.4
20.0 - 21.99 13.0
18.0 - 19.99 11.6
S 764-209
(8)
Set the toggle switch on the squib test box to OFF.
S 864-210
(9)
Release the DISCH switch.
S 084-211
(10)
Disconnect the electrical connector from the squib test box.
S 484-212
(11)
Connect electrical connector DM7907B, for the bottle B forward squib, to the squib test box.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
26-21-01
ALL ú ú 08 Page 424 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 864-213
(12) Push and hold the DISCH switch.
(a) Make sure the BOTTLE DISCHARGE light on the squib test box is on.
S 974-214
(13)
Make a record of the voltage shown on the multimeter (V1).
S 864-215
(14)
Set the toggle switch on the squib test box to ON.
S 974-216
(15)
Make a record of the voltage shown on the multimeter (V2).
(a) For voltage V1 in the range shown, make sure that voltage V2 is greater that or equal to the value shown in the cargo bay test voltage table.
S 864-217
(16)
Set the toggle switch on the squib test box to OFF.
S 864-218
(17)
Release the DISCH switch.
S 864-219
(18)
Push the FWD ARMED switch to off.
S 084-220
(19)
Disconnect the electrical connector from the squib test box.
S 864-221
(20)
Open, then close these circuit breakers:
(a) P6 Main Power Ditribution Panel
1) 6H6 FIRE EXTINGUISHER LOWER CARGO
S 484-222
(21)
Connect electrical connector DM7908B, for the bottle C forward squib, to the squib test box.
(22)
Push the FWD ARMED switch to on.
S 864-224
(23)
Push the DISCH switch.
S 864-223
(a) PASSENGER AIRPLANES AND FREIGHTERS; make sure the BOTTLE DISCHARGE light on the squib test box stays off.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
26-21-01
ALL ú ú 07 Page 425 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 864-225
(24) PASSENGER AIRPLANES AND FREIGHTERS; close this circuit breaker:
(a)
P7 panel
1) 7F23 LANDING GEAR DSP & CONT ALTN
(b)
Make sure the BOTTLE DISCHARGE light on the squib test box is on.
S 974-226
(25)
Make a record of the voltage shown on the multimeter (V1).
S 864-227
(26)
Set the toggle switch on the squib test box to ON.
S 974-228
(27)
Make a record of the voltage shown on the multimeter (V2).
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本文链接地址：747-400 AMM 飞机维护手册 防火 FIRE PROTECTION 2(70)
