S 865-008

 (3)  
Select "<GROUND TESTS" by pressing line select key next to it.

 S 865-009

 (4)  
Select "<26 FIRE PROTECTION" from the menu.

 S 865-226

 (5)  
Press the LINE SELECT key for FIRE SYSTEM TEST.

 S 745-011

 (6)  
The "IN PROGRESS" indication will show for the duration of the test.

 S 745-012

 (7)  
When the test is finished, the screen will show "PASS" or "FAIL>".

 S 745-013

 (8)  
If the indication is "PASS", the test is finished.

 S 745-223

 (9)  
If FAIL> is shown on the CDU, push the line select key next to FAIL>. Do the corrective action(s) for the CMC message(s) listed. Use the NEXT PAGE or PREV PAGE button to look through the messages.

 NOTE: The CMC ground test FAIL> indication may show as a
____ result of open circuit breakers or a fault of the related fire/overheat protection system.
 S 865-015
 (10) Set both of the following switches to "NORM":
 (a)  
S2089 Ground Test Enable Switch (P461)

 (b)  
S2090 Remote Test Enable Switch (RCDU).

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A
747-400 MAINTENANCE MANUAL
 F. Restore to Normal
 S 865-242
 (1)  
Close the circuit breakers opened during the prepare for test section of this procedure and remove DO-NOT-CLOSE identifiers.

 S 865-120

 (2)  
Remove electrical power if no longer required (AMM 24-22-00/201).

 TASK 26-15-00-735-009
 3.  System Test (Fig. 501)___________
 A. Standard Equipment
 (1)  
Multimeter

 (2)  
Megohmmeter (Megger)

 (3)  
Jumper wires (two)

 (4)  
Resistor (one) - 350 +/- 50 ohms

 B.
References

 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AIPC 26-15-02, Fig. 2

 (3)  
WDM 26-15-11

 (4)  
SSM 26-15-01

 C.
Access

 (1)  
Location Zone 117 Electrical & Electronics Compartment, L.H. 138 Body Landing Gear Well R.H. 221 Control Cabin LH 222 Control Cabin RH 317 APU Compartment, LH 318 APU Compartment, RH

 (2)  
Access Panel 317A Door - Access - APU 318A Door - Access - APU 761 Body Landing Gear - Aft Inboard Right 763 Body Landing Gear - Fwd Inboard Right

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 D. Prepare for Tests
 S 865-225
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 865-025

 (2)  
Close these circuit breakers:

 (a)  P180, DC Power Distribution Panel
 1) 180D17, CMC ENABLE SWITCH

 S 865-121
 CAUTION: AFTER YOU COMPLETE THE TEST, MAKE SURE BOTH GROUND TEST
_______
 SWITCHES ARE SET TO "NORM".

 (3)  
Open these circuit breakers:

 (a)  
P6, Main Power Distribution Panel 1) 6C5, ALTN PWR APU FIRE/BLD DUCT OVHT LOOP A 2) 6C6, FIRE SW UNLOCK 3) 6H1, FIRE EXTINGUISHER ENG 1&3 B 4) 6H2, FIRE EXTINGUISHER ENG 1&3 A 5) 6H3, FIRE EXTINGUISHER ENG 2&4 B 6) 6H4, FIRE EXTINGUISHER ENG 2&4 A 7) 6H5, FIRE EXTINGUISHER APU 8) 6H14, APU FIRE/BLD DUCT OVHT LOOP A 9) 6H15, APU FIRE/BLD DUCT LOOP OVHT LOOP B

 (b)  
P7, Overhead Circuit Breaker Panel
 1) 7F9, EIU L
 2) 7F10, EIU C
 3) 7F15, EIU R

 (4)  
Stop for five seconds.

 S 865-011

 (5)  
Close these circuit breakers:
　
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