B. Access
(1)
Location Zone
133 Air Conditioning Equipment Bay, LH
134 Air Conditioning Equipment Bay, RH
(2)
Access Panel
191EL Air Conditioning (Pack 1)
191ML Air Conditioning (Pack 2)
192ER Air Conditioning (Pack 3)
C. Prepare to Remove the Limit Switch
S 014-002
(1) Open the access panel for the applicable pack (Ref 06-09-03/201):
(a) 191EL for pack 1
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747-400
MAINTENANCE MANUAL
SEE A
RAM AIR EXIT DOOR ACTUATOR
SEE C
RAM AIR EXIT DOOR
RAM AIR EXIT DOOR LIMIT SWITCH SEE B
A
Ram Air Exit Door Limit Switch Installation
Figure 401 (Sheet 1)
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MAINTENANCE MANUAL
RAM AIR EXIT DOOR LIMIT SWITCH
RAM AIR EXIT DOOR ACTUATOR
Ram Air Exit Door Limit Switch Installation
Figure 401 (Sheet 2)
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747-400 MAINTENANCE MANUAL
(b)
191ML for pack 2
(c)
192ER for pack 3
S 864-007
(2)
Put the PACKS (1,2 or 3) switch to OFF, on the P5 overhead panel, for the applicable pack (1,2 or 3).
S 864-008
(3)
Put a DO-NOT-OPERATE tag on the PACKS switch.
S 864-009
(4)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6 Main Power Distribution Panel
1) 6F35, PACK TEMP CONT A
2) 6F36, PACK TEMP CONT B
(b)
P180 DC Power Distribution Panel
1) 180J2 PACK 1 PROT
2) 180F2 PACK 2 PROT
3) 180J17 PACK 3 PROT
(c)
P415 Power Distribution Center - Right 1) 415C38 PACK TEMP CONT B 2) 415K27 PACK TEMP CONT A
D. Remove the Limit Switch
S 034-010
(1)
Disconnect the wires from the terminals 1 and 3 on the limit switch.
S 034-047
(2)
Remove the remaining sealant from the wires and the limit switch.
S 034-013
(3)
Remove the lockwire from the jamnuts on the limit switch.
(4)
Remove the jamnuts and the lockwasher on the limit switch.
(5)
Remove the limit switch from the support bracket.
S 034-011
S 024-012
TASK 21-62-12-404-003
3. Ram Air Exit Door Limit Switch Installation (Fig. 401)___________________________________________
A. Standard Tools and Equipment
(1) Ohmmeter
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MAINTENANCE MANUAL
B. Consumable Materials
(1) A00247 Sealant, Pressure and Enviromental - Chromate Type - BMS5-95
C. References
(1)
06-09-03/201, Body Section 44 Access Doors and Panels
(2)
20-11-28/401, Lockwire
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本文链接地址：747-400 AMM 飞机维护手册 空调 AIR CONDITIONING 2(185)
