S 735-098
(3) FREIGHTERS; Do these steps:
(a)
Open this circuit breaker on the DC Power Distribution Panel, P180: 1) 180J1, FLOW CONT VLV PACK ONE
(b)
Put the main deck fire arm switch on the overhead P5 panel to ARMED.
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747-400 MAINTENANCE MANUAL
(c)
Make sure the equipment cooling supply fan is on.
(d)
Make sure the equipment cooling exhaust fan is off.
(e)
Make sure the primary and secondary aft equipment cooling fans are off.
(f)
Make sure the inboard supply valve, inboard exhaust valve, ground exhuast valve, smoke/overide valve, and E6/E9 valve are closed.
(g)
Make sure the bypass valve is open.
(h)
Make sure the 3-way valve is set to A-B (port C closed).
(i)
Open these circuit breakers on the DC Power Distribution Panel, P180: 1) 180H30, EQUIP COOL EXH FAN CONT 2) 180J04, EQUIP COOL CONT SUPPLY FAN
(j)
Make sure the supply fan and the exhaust fan are off.
(k)
Make sure that after 40 seconds these messages are not shown:
~.................................................. | EICAS caution | EQUIP COOLING | .................................................... | EICAS status | EE CLNG OVRD | .................................................... | EICAS status | FLT DK LOW FLOW | .................................................... | EICAS status | EQUIPMENT TEMP | .................................................... | EICAS status | EQUIP LOW FLOW | 2.....................…............................1
(l)
Close these circuit breakers on the P180 panel: 1) 180H30, EQUIP COOL EXH FAN CONT 2) 180J04, EQUIP COOL CONT SUPPLY FAN
(m)
Put the main deck fire arm switch on the P5 overhead panel to the off position.
(n)
Do this step to restart the aft equipment cooling fans:
1) Set the equipment cooling switch to OVRD, then back to NORM.
(o)
Make sure the supply and exhaust fans are on.
(p)
Make sure that the primary or secondary aft equipment cooling fan is on.
(q)
Make sure the inboard supply valve, inboard exhautst valve, and the E6/E9 valve is open.
(r)
Make sure the bypass valve, the ground exhaust valve, and the Smoke/Override valve are closed.
(s)
Make sure the 3-way valve is set to C-B (port A closed).
(t)
Close the following P180 panel circuit breaker: 1) 180J01, FLOW CONT VLV PACK ONE
E. Return the airplane to its usual condition
S 865-091
(1) Do the "Put the Air/Ground Relay System Back in the Ground Mode" task (Ref 32-09-02/201).
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S 415-069
(2)
Install the forward cargo sidewall lining (Ref 25-52-01/401).
S 865-070
(3)
Remove electrical power if it is not necessary (Ref 24-22-00/201).
TASK 21-58-00-735-013
11. System Test - Electrical Test_____________________________
A. Special Tools and Equipment
(1) G21001-11, Lockout Assembly - N2 Speed Card Test Switch
B. Standard Tools and Equipment
(1) External Ground Power Source for Equipment Cooling Fan (3 phase, 115V ac power source, wiring and electrical connector).
C. References
(1)
24-22-00/201, Manual Control
(2)
25-14-01/401, Ceiling Drip Shield
(3)
25-22-01/401, Main Passenger Cabin Ceiling Access Panels
(4)
25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Linings
(5)
32-09-02/201, Air/Ground Relay System
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本文链接地址：747-400 AMM 飞机维护手册 空调 AIR CONDITIONING 2(72)
