S 912-176

 (14)
 Remove the external electrical power from the airplane
 (AMM 24-22-00/201).

 S 412-124
 CAUTION: KEEP A MINIMUM CLEARANCE OF 0.18 INCHES (5 MM) BETWEEN THE
_______
 ENGINE, FIRE DETECTOR, CLAMPS AND LOWER SHROUD.

 BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD. DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
 (15) Install the lower shroud:
 (a)  
Hold the lower shroud against the upper shroud.

 (b)  
Close the shroud latches.

 S 412-125
 (16) Close the APU cowl door:
 (a)  
Disconnect the door support rods.

 (b)  
Put the door support rods in the clips on the APU cowl door.

 (c)  
Close the APU cowl door.

 (d)  
Close the latches for the APU cowl door.

 S 862-126
 (17) Set the circuit breaker and the switch:
 (a)  
Remove the DO-NOT-CLOSE tag and close this circuit breaker: 1) E3-3 Electrical Shelf, APU Control Unit

 (b)  
Remove the DO-NOT-OPERATE tag from the APU master switch on the P5 forward overhead panel.

 TASK 49-11-00-862-187
 8. APU System Deactivation (The APU Installed)
_______________________
 A. General
 (1)  
This procedure gives the steps to prepare the airplane for flight with the APU installed but not connected.

 (2)  
To prepare the airplane for flight with the APU installed but not connected, you must put a tag on the APU master switch and close the applicable circuit breakers.

 B. Special Tools and Equipment
 (1)  G57NB-5 Collar - Circuit Breaker, Nylon Molding Corp., 1617 S. California, Monrovia, CA 91016 (two are necessary)
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C. Access
 (1)  
Location Zones
 101 Control Cabin, LH
 102 Control Cabin, RH
 205 Electronic Compartment

 (2)  
Access Panels
 1201 Electronic Equipment Access Door

 D. Procedure
 S 862-188
 (1)  
Make sure the APU master switch on the P5 forward overhead panel is in the OFF position with an APU-INOPERATIVE tag.

 S 862-189

 (2)  
Open these circuit breakers and install the collars:

 (a)  
P6-5 Load Control Center Assembly
 1) APU CONT

 (b)  
E3-3 Electrical Shelf, APU Control Unit

 TASK 49-11-00-862-190
 9. APU System Activation (The APU Installed)
_____________________
 A. General
 (1)  This procedure gives the steps to prepare the APU for operation after the deactivation procedure.
 B. References
 (1)  AMM 26-15-00/501, Fire Detection System
 C. Access
 (1)  
Location Zones
 101 Control Cabin, LH
 102 Control Cabin, RH
 205 Electronic Compartment

 (2)  
Access Panels
 1201 Electronic Equipment Access Door

 D. Procedure
 S 862-191
 (1)  Remove the collars and close these circuit breakers:
 (a)  
E3-3 Electrical Shelf, APU Control Unit

 (b)  
P6-5 Load Control Center Assembly
 1) APU CONT

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S 862-192
 (2)  
Remove the APU-INOPERATIVE tag from the APU master switch on the P5 forward overhead panel.

 S 732-244

 (3)  
Do a test of the fire detection system for the APU
 (AMM 26-15-00/501).