(e)  
Turn the compressor plenum down until the plenum opening does not align with the duct in the upper shroud.

 (f)  
Remove the nuts, the washers, and the bolts that attach the mount caps to the engine mount brackets (Fig. 401, Detail D). 1) Do not remove the cap and the hinge bolts for the mount

 bracket.

 (g)  
Open the mount caps.

 (h)  
Slowly lower the APU engine on the transportation dolly.

 1)  Make sure the APU stays clear of the air duct coupling, the fuel line, and the airplane structure while you lower it.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES/MAINTENANCE MANUAL ////////////////////////
(i)  After the APU is on the transportation dolly, loosen the hoist cables or chains.
 S 094-009
 (7)  Remove the pins to disconnect the hoist cables or chains from the tubes.
 NOTE: If more cradles are available, you can use them for the
____ transportation and the storage of the APU engines.
 TASK 49-11-00-404-011
 3. APU Power Plant Installation (Fig. 401)
____________________________
 A. Special Tools and Equipment
 (1)  
F80114-25 Assembly - APU Cradle

 (2)  
F80114-1 Assembly - APU Cradle (optional to the F80114-25 APU Cradle)

 (3)  
PF51-003-1 Assembly - Hoist, PF Industries, 9320 15th South, Seattle, Washington 98108

 (4)  
F80039-1 Assembly - Hoist, (optional to the PF51-003 hoist)

 (5)  
AP6108 Hoist - (Optional to the PF51-003 hoist) Morgan Aero Products, 2719 Pacific Avenue, Everett, WA 98201

 (6)  
F72950-138 Dolly - Transportation

 B. References
 (1)  
AMM 26-15-00/501, Fire Detection System

 (2)  
AMM 49-11-00/201, Auxiliary Power Unit

 (3)  
AMM 49-11-00/501, Auxiliary Power Unit

 (4)  
AMM 49-81-31/401, Aft Fairing Assembly

 C. Access
 (1)  
Location Zones
 101 Control Cabin, LH
 205 Electronic Compartment
 703 APU Compartment

 (2)  
Access Panel
 1201 Electronic Equipment Access Door
 3804 APU Cowl Door

 D. Procedure
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S 214-012

 CAUTION:_______ MAKE SURE YOU EXAMINE THE APU FIRE DETECTOR.  THE WALTER KIDDE
 AND THE SYSTRON DONNER FIRE DETECTORS ARE NOT INTERCHANGEABLE.
 THE APU MUST HAVE THE CORRECT FIRE DETECTOR INSTALLED.  THE
 FIRE DETECTION SYSTEM FOR THE APU WILL NOT OPERATE WITH AN

 INCORRECT DETECTOR INSTALLED.
 (1)  
Visually examine the APU engine to make sure it has the correct fire detector installed.

 S 214-049

 (2)  
Make sure the cooling fan inlet screen is clean.

 (a)  If it is necessary, replace with a new or a clean cooling fan inlet screen.
 S 214-050
 (3)  Inspect the APU air inlet for blockage, missing fasteners, and loose fasteners.
 (a)  
If you find blockage, remove the blockage that you find.

 (b)  
If you find loose or missing fasteners, repair the loose or missing fasteners that you find.

 S 494-013
 (4)  Install or connect the hoist equipment (Fig. 401):
 (a)  
Put the APU power plant, installed on a cradle base, directly below the APU compartment.

 (b)  
If you use the F80002 cradle, put the tubes in the cradle base.

 1)  Attach the tubes in their position with the pins (Fig. 401, Detail A).

 (c)  
Connect the hoist cables or chains to the tubes with the pins.

 S 424-014
 (5)  Install the APU (Fig. 401):
　
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