(3)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 S 845-016

 (4)  
Do the activation procedure for the spoilers if you did the deactivation procedure (AMM 27-61-00/201).

 S 845-018

 (5)  
Put the airplane to its usual condition.

 TASK 24-21-00-735-002
 3. System Test - APU Generator
___________________________
 A. General
 (1)  
The system test does these tests:

 (a)  
The BITE (Built-in-Test Equipment) test.

 (b)  
The Ground Handling and Ground Service Test.

 (c)  
The Air Mode Test.

 (d)  
The Load Test.

 (2)  
If the spoilers are extended, and electrical power is removed, the spoilers will retract in less than one second.

 WARNING: DO THE DEACTIVATION PROCEDURE FOR THE SPOILERS OR MOVE ALL
_______ PERSONS AND EQUIPMENT AWAY FROM THE SPOILERS. THE SPOILERS CAN RETRACT QUICKLY AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3)  Do the deactivation procedure for the spoilers (AMM 27-61-00/201) or move all persons and equipment away from the spoilers.
 B. References
 (1)  
AMM 24-22-00/201, Electrical Power - Control

 (2)  
AMM 27-61-00/201, Spoiler/Speedbrake Control System

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757
MAINTENANCE MANUAL

 (3)  
AMM 32-09-02/201, Air/Ground Relays

 (4)  
AMM 49-11-00/201, Auxiliary Power Unit (APU)

 C.  Access
 (1)  
Location Zones
 212 Flight Compartment (RH Side)
 119/120 Main Equipment Center

 (2)  
Access Panels
 119BL Main Equipment Center Panel

 D.  Prepare for the Test
 S 865-008
 (1) Supply external power to the 115V ac buses (AMM 24-22-00/201).
 E.  The BITE Test
 S 745-009
 (1)  Do the BITE test:
 (a)
Make sure the BAT switch (P5) is in the ON position.

 (b)
Momentarily push the BIT switch on the BPCU (E5-3).

 1)  Make sure the indication sequence shows on the BPCU: a) EXTERNAL POWER SYSTEM b) OK c) LEFT GEN POWER SYSTEM d) OK e) RIGHT GEN POWER SYSTEM f) OK g) APU GEN POWER SYSTEM h) OK i) LAST FLT 00 END OF DATA j) FOR PREVIOUS FLT PUSH NOW k) If it is necessary to see this display again, stop
 until the FOR PREVIOUS FLT PUSH NOW indication goes off. l) Momentarily push the PERIODIC TEST switch.
 F.  The Ground Handling and Ground Service Test
 S 725-010
 (1)  Do the ground handling and ground service test:
 (a)  Supply APU generator power to the 115V ac buses (AMM 24-22-00/201).
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757 MAINTENANCE MANUAL
 (b)  
Push the right BUS TIE switch (P5) to the ISLN position.

 1)  Make sure these yellow lights on the P5 panel are on: a) The ISLN light in the right BUS TIE switch. b) The right BUS OFF light.

 (c)  
Set the NLG W/W INSP LT SWITCH, S324 (P63) to the ON position.

 1)  Make sure the inspection lights for the nose wheel well are on.

 (d)  
Push the GRND SERV BUS switch on the flight attendant's panel P21. 1) Make sure the white light in the switch comes on. 2) Make sure the inspection lights for the nose wheel well are

 on. 3) Make sure the red 115V GND SVCE HOT BUS WARNING light on the P33 panel is on.

 (e)  
Push the GRND SERV BUS switch on the P21 panel. 1) Make sure the white light in the switch goes off. 2) Make sure the 115V GND SVCE HOT BUS WARNING light on P33 is

 off.

 (f)  
Push the GRND SERV BUS switch on the P21 panel. 1) Make sure the white ON light in the switch is on.
　
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