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(b)  Set the No. 1 AFT FUEL PUMP switch on the P5 forward overhead panel to the ON position.
 NOTE: If you must use the fuel boost pumps in the
____ center tank, you must have a maintenance person or observer in the flight compartment to continuously monitor the LOW PRESSSURE lights. Turn the applicable fuel boost pump to the OFF position if the LOW PRESSURE light for the center tank stays on.
 (c)  
Examine the fuel inlet line with the cap to make sure there is no fuel leakage. 1) If you find leakage, tighten the cap on the fuel inlet

 line.

 (d)  
Set the No. 1 AFT FUEL PUMP switch on the P5 forward overhead panel to the OFF position.

 (e)  
Close the APU fuel valve with the manual override lever.

 S 162-201
 (11) Blow the compressed air through the drains on the lower shroud to make sure there is no blockage.
 S 412-213
 CAUTION:_______BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD. DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
 (12) Install the lower shroud:
 (a)  
Hold the lower shroud against the upper shroud.

 (b)  
Close the shroud latches.

 TASK 49-11-00-862-203
 11. APU System Activation (The APU Removed)_____________________
 A. General
 (1)  
This procedure gives the steps to prepare the APU for operation.

 (2)  
To prepare the airplane for flight with the APU installed again, you must remove the protective caps, covers and plugs in the upper shroud and install the APU. Also, you must activate the air inlet door, APU fuel valve, APU master switch and the applicable circuit breakers.

 B. References
 (1)  AMM 26-15-00/501, Fire Detection System
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(2)  
AMM 49-11-00/401, APU Power Plant

 (3)  
AMM 49-15-00/501, Air Inlet Door

 (4)  
AMM 49-15-31/401, Air Inlet Door Actuator

 C. Access
 (1)  
Location Zones
 101 Control Cabin, LH
 102 Control Cabin, RH
 216 Left Main Wheel Well
 701 Tail Compartment
 703 APU Compartment

 (2)  
Access Panels
 3701 Stabilizer Trim Access Door
 3804 APU Cowl Door

 

 D. Procedure
 S 862-214
 (1) Open these circuit breakers and install DO-NOT-CLOSE tags:
 (a)  
P6-2 Load Control Center
 1) FIRE PROTECTION DETECTION, APU

 (b)  
P6-4 Load Control Center
 1) CONTROL GENERATOR, APU

 (c)  
P5 Load Control Center
 1) BAT BUS AUTO

 (d)  
P18-5 2nd Observer Panel
 1) HOT BATTERY BUS
 2) SWITCHED HOT BATTERY BUS

 

 S 012-215
 CAUTION:_______BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD. DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
 (2)  Remove the lower shroud:
 (a)  
Hold the lower shroud and open the shroud latches.

 (b)  
Remove the shroud.

 S 032-204
 (3)  Remove the coverplate from the cooling air outlet on the lower shroud (Fig. 207).
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////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES/MAINTENANCE MANUAL ////////////////////////
S 862-205
 (4)  Do the activation of the APU compartment (Fig. 206):
 (a)  
Remove the dummy plug assembly from the receptacle for the APU fire detector.

 (b)  
Remove the caps from these electrical connectors in the upper shroud: 1) AIRPLANES WITH THE ETC;

 The receptacle for the electronic temperature control 2) the receptacle for the exhaust gas temperature (EGT) 3) the receptacle for the APU harness 4) the receptacle for the starter motor 5) the receptacle for the APU electrical generator 6) the receptacle for the generator control.
　
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