747-400 AMM 飞机维护手册 防火 FIRE PROTECTION 2(120)

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 (2)  Disconnect the discharge hose from the discharge port for the forward bottle A (M7906) (STA 950, RBL 102).
 (3)  S 035-173Disconnect the discharge hose from the discharge port for the forward bottle B (M7907) (STA 930, RBL 102).
 (4)  S 485-077Connect dry plant air or nitrogen to the open hose that was disconnected from the forward discharge port of bottle A, using an appropriate connector from the adaptor kit.
 (5)  S 865-273Pressurize the halon distribution tubing to 15 to 50 psig.
 (6)  S 715-137Make sure the air or nitrogen flows freely from the hose that was disconnected from the forward discharge port of the bottle B.
 (7)  S 865-138Decrease the pressure to zero psig.
 (8)  S 035-078Install a suitable cap from the adaptor kit on the hose that was disconnected from the forward discharge port of the bottle B.
 (9)  S 865-079Pressurize the halon distribution tubing leading to the forward cargo compartment. The maximum pressure should be 50 psig and the minimum pressure should be 35 psig.
 S 735-082

 (10)
 Make sure the air or nitrogen flows freely from nozzles located in the forward compartment ceiling at STA 536, RBL 6.50 and STA 756, RBL 6.50.

 S 715-139

 (11)
 Make sure the air or nitrogen does not flow from the forward compartment jet nozzles at STA 743, RBL 6.50 (approximately) and STA 523, RBL 6.50 .

 S 715-140

 (12)
 Make sure the air or nitrogen does not flow freely from the nozzles located in the aft compartment ceiling at STA 1736, RBL 6.50 and STA 1723, RBL 6.50 (approximately).

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747-400 MAINTENANCE MANUAL
 S 715-141
 (13)
 Make sure the DISCH caution light on the fire control module M7326 (P5) comes on.

 S 865-083

 (14)
 Remove the pressure from the halon distribution tubing.

 S 085-084

 (15)
 Disconnect the air or nitrogen from the forward halon distribution tubing.

 S 035-142

 (16)
 Connect and tighten the hose to the forward discharge port of the bottle A (AMM 26-23-01/401).

 S 435-085

 (17)
 Remove the cap from the hose leading to the forward cargo
 compartment halon distribution tubing.

 S 035-143

 (18)
 Connect and tighten the hose to the forward discharge port of the bottle B (AMM 26-23-01/401).

 S 865-086

 (19)
 Push the reset button on S1890 (STA 926, RBL 120, WL 180) pressure switch.

 S 715-132

 (20)
 Make sure the DISCH caution light on the fire control module M7326 (P5) goes off.

 G. Aft Non-Metered Discharge Line Test
 S 215-088
 (1)  Make sure all halon distribution tubings from the halon bottle shelf to the lower cargo compartment are not loosely connected or disconnected.
 S 035-089
 CAUTION:_______DO NOT PRESSURIZE THE HALON BOTTLES. DAMAGE TO DISCHARGE PORTS CAN OCCUR.
 (2)  
Disconnect the discharge hose from the aft discharge port of the bottle A (M7906) (STA 950, RBL 102).

 S 035-174

 (3)  
Disconnect the discharge hose from the aft discharge port of bottle B (M7907) (STA 950, RBL 102).

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 ALL  ú ú 03 Page 517 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 435-090

 (4)  Connect dry plant air or nitrogen to the open hose that was disconnected from the aft discharge port of the bottle A. Use an appropriate connector from the adaptor kit.
 (5)  S 865-133Pressurize the halon distribution tubing to 15 to 50 psig.
 (6)  S 715-134Make sure the air or nitrogen flows freely from the hose that was disconnected from the aft discharge port of the bottle B.
 (7)  S 865-135Decrease the pressure to zero psig.
　
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