(7)
AIPC 21-51-00 Fig. 5A

 (8)
AIPC 21-51-00 Fig. 6

 (9)
AIPC 21-51-00 Fig. 6A

 (10)
 AIPC 21-51-00 Fig. 7

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 21-51-01
 ALL  ú ú 03 Page 403 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
 B.
C.
D.
E.
A
747-400 MAINTENANCE MANUAL
 (11)
 AIPC 21-51-00 Fig. 7A

 (12)
 WDM 21-51-11, 21-51-12, 21-51-13

 (13)
 SSM 21-51-01Equipment

 (1)  
Bonding Meter

Consumable Materials

 (1)  
B00192 Solvent, BMS 3-2, type 1

 (2)  
G00378 Alodine

 (3)  
G00033 Lint-free cheesecloth

Access

 (1)  
Location Zone 133 Air Conditioning Equipment Bay, LH 134 Air Conditioning Equipment Bay, RH

 (2)  
Access Panel 191H-L Air Conditioning Access Door 191N-L Air Conditioning Access Door 192N-R Air Conditioning Access Door

Install the Valve
 S 164-035
 (1)  
Make sure the duct and valve flanges are clean and there is no grease on them.

 S 434-036

 (2)  
Make sure the seals in the duct flanges are not damaged.

 S 434-037

 (3)  
Make sure the duct flange seals are in the flange grooves.

 S 214-039

 (4)  
Make sure the supply duct is lined up to prevent vibration with the ground connector.

 NOTE: If the supply duct is not lined up during installation, this
____
 duct will rub against the ground connector.

 S 424-013
 (5)  Put the valve in its position in the duct.
 NOTE: Make sure the flow arrow on the valve points to the heat
____
 exchangers.

 S 434-014
 (6)  Install the clamps on each end of the valve.
 (a)  Do not tighten the clamps.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 21-51-01
 ALL  ú ú 02 Page 404 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 824-015
 (7)  
Turn the valve until you can connect the electrical connector and the bonding jumpers.

 S 434-016

 (8)  
Tighten the clamp nuts to 65 - 75 pound-inches

 (7.35 to 8.47 newton-meters).
 S 434-017
 (9)  To connect the bonding jumpers to the valve, do these steps:
 (a)  Use the solvent and the cheesecloth to clean and dry the bonding surfaces (AMM 20-11-14/701).
 NOTE: The bonding surfaces must be clean and dry to
____ provide a good electrical ground path.
 (b)  
Connect the bonding jumpers to the flow control valve.

 (c)  
Use the bonding meter to measure the resistance between each bonding jumper terminal and the flow control valve near the bonding jumper connection. (AMM 20-22-01/601).

 NOTE: If necessary, you can remove a small area of the
____ surface finish to make the measurement.
 (d)  
If the resistance is greater than 0.0025 ohms, then disassemble the bonding jumper connection, repeat the cleaning and assembly steps, and measure the resistance again.

 (e)  
If you removed any of the surface finish from the flow control valve, then use the alodine to repair the surface finish.

 S 434-027
 (10) Connect the electrical connector to the valve.
 F. Do the Installation Test for the Valve
 S 864-033
 (1)  
Supply electrical power (AMM 24-22-00/201)

 (2)  
Supply pneumatic power (AMM 36-00-00/201)

 S 864-018

 (3)  
Remove the DO-NOT-OPERATE tag from the applicable PACK selector, on the P5 panel.

 S 864-034
 (a)  Turn the PACK selector to the NORM position.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 空調 AIR CONDITIONING 2(6)