(g)
Set the STANDBY POWER switch to AUTO.
G. Do the Operational Test of the RCCBs for the APU Static Inverter Source
S 715-033
(1)
Do a test of the APU INVERTER POWER/APU BAT (C10412) RCCB.
(a)
Open this circuit breaker:
1) P6, Main Power Distribution Panel a) 6A8, APU STBY XFR RELAY
(b)
Make sure that the two (captain and first officer) primary flight display (PFD) and navigation display (ND) screens are on.
(c)
Open this circuit breaker:
1) P6, Main Power Distribution Panel a) 6J6, AC STBY PWR APU BAT CONT
(d)
Make sure that the captain's PFD and ND go off.
NOTE: The first officer's PFD and ND will stay on.
____
(e)
Close these circuit breakers:
1) P6, Main Power Distribution Panel a) 6J6, AC STBY PWR APU BAT CONT b) 6A8, APU STBY XFR RELAY
(f)
Make sure that the captain's PFD and ND screens come on.
S 715-034
(2)
Do a test of the APU INVERTER TRANSFER RELAY POWER (C10416) RCCB.
(a)
Open this circuit breaker:
1) P6, Main Power Distribution Panel a) 6A8 APU STBY XFR RELAY
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747-400
MAINTENANCE MANUAL
(b)
Make sure that the two (captain and first officer) primary flight display (PFD) and navigation display (ND) screens are on.
(c)
Open this circuit breaker:
1) P6, Main Power Distribution Panel a) 6J5, APU INV XFR RLY PWR CONT
(d)
Make sure that the captain's PFD and ND go off.
NOTE: The first officer's PFD and ND will stay on.
____
(e)
Close these circuit breakers:
1) P6, Main Power Distribution Panel a) 6J5, APU INV XFR RLY PWR CONT b) 6A8, APU STBY XFR RELAY
(f)
Make sure that the captain's PFD and ND screens come on.
H.
Put the Airplane Back to the Usual Configuration.
S 865-035
(1)
Close these circuit breakers:
(a)
P6, Main Power Distribution Panel
1) 6F24, FLT DK LIGHTS DOME
2) 6F1, IGN 1 ENG 1
3) 6K19, IGN 2 ENG 1
4) 6G19, STBY IGN ENG 1
5) 6F2, IGN 1 ENG 2
6) 6K20, IGN 2 ENG 2
7) 6G20, STBY IGN ENG 2
8) 6F3, IGN 1 ENG 3
9) 6K21, IGN 2 ENG 3
10) 6G21, STBY IGN ENG 3
11) 6F4, IGN 1 ENG 4
12) 6K22, IGN 2 ENG 4
13) 6G22, STBY IGN ENG 4
S 865-037
(2) Remove electrical power from the airplane if it is not necessary (AMM 24-22-00/201).
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747-400 MAINTENANCE MANUAL
REMOTE CONTROL CIRCUIT BREAKER - REMOVAL/INSTALLATION
_____________________________________________________
1. General_______
A. The following describes procedures for removing and installing remote control circuit breakers (RCCBs) mounted behind airplane power panels. In addition to the removal and installation instructions for the RCCBs, the procedure includes an operational test to verify operation of the RCCB following installation.
B. The panels with RCCBs are located in the area between nose gear wheel well in the P180 DC Power Distribution Panel and in the aft passenger cabin area P183 E-33 Equipment Center Panel.
TASK 24-60-01-004-002
2. Remove Remote Control Circuit Breaker (Fig. 401)_____________________________________
A. References
(1)
24-22-00/201, Manual Control
(2)
IPC 24-50-01
(3)
IPC 24-50-02
(4)
WDM 24-31-21, 24-32-12, 24-33-11, 24-33-12, 24-33-31
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