(2)
Get access to the heater
(3)
The removal of the heater
(4)
The installation of the heater
(5)
An operational test of the heater.
TASK 21-42-02-004-001
2. Flight Crew Shoulder Heater Removal (Fig. 401)
___________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 25-19-04/401, Flight Deck Crew Rest Lining
(3)
AMM 25-40-03/401, Upper Deck Lavatories
(4)
AIPC 21-22-51 Fig. 1
(5)
SSM 21-45-05
(6)
WDM 21-45-31
B. Access
(1) Location Zone
221 Control Cabin, LH
222 Control Cabin, RH
C. Prepare for the Removal
NOTE: The flight crew shoulder heaters are installed at floor level,
____ immediately inboard of the fuselage, at Station 390 [20 inches (50 cm) aft of the escape hatch centerline].
S 014-029
(1) For the captain's shoulder heater, remove the flight compartment crew rest sidewall lining to get access to the heater (AMM 25-19-04/401).
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747-400
MAINTENANCE MANUAL
(2 LOCATIONS)
LEFT HEATER (EXAMPLE)
Flight Crew Shoulder Heater Installation
Figure 401
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A
747-400 MAINTENANCE MANUAL
S 014-035
(2) For the first officer's shoulder heater, remove the forward right upper deck lavatory (AMM 25-40-03/401).
D. Heater Removal
S 864-024
(1) For the captain's shoulder heater, open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) P414 Power Distribution Center - Left 1) 414H10 AUX HEAT PWR CAPT HIGH 2) 414H11 AUX HEAT PWR CAPT LOW
S 864-025
(2) For the first officer's heater, open these circuit breakers
(a) P414 Power Distribution Center - Left. 1) 414H12 AUX HEAT PWR F/O HIGH 2) 414H13 AUX HEAT PWR F/O LOW
S 034-026
(3) Remove the electrical connector from the heater:
(a)
The captain's shoulder heater electrical connector DH523
(b)
The first officer's shoulder heater electrical connector DH524.
S 034-027
(4)
Loosen the clamps at each end of the heater and pull the ducts from the heater.
S 024-028
(5)
Remove the support clamps and remove the heater.
TASK 21-42-02-404-008
3. Flight Crew Shoulder Heater Installation
________________________________________
A. References
(1) AMM 21-00-00/201, Air Conditioning
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A
747-400
MAINTENANCE MANUAL
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 25-19-04/401, Flight Deck Crew Rest Lining
(4)
AMM 25-28-01/201, Overhead Stowage Bins
(5)
AMM 25-40-03/401, Upper Deck Lavatories
(6)
AMM 32-09-02/201, Air/Ground Relay System
(7)
AMM 35-11-18/401, Mask/Regulator/Stowage Box
(8)
AIPC 21-22-51 Fig. 1
(9)
SSM 21-45-05
(10)
WDM 21-45-31
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 空调 AIR CONDITIONING 1(143)
