S 014-003
 (2)  Open the APU cowl door:
 (a)  
Open the latches for the APU cowl door.

 (b)  
Open the APU cowl door.

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////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE  A 
APU CONTROL THERMOSTAT 
TURBINE EXHAUST PORT 
FLANGE MOUNTING BSEE  AIR LINE FOR THE BLEED LOAD CONTROL 
FLANGE MOUNTING 
FWD 
A  RETAINER 
THERMOSTAT CONTROL  WASHER 
NUT AIR LINE  BOLT 
CONTROL AIR LINE  B
Figure 401 APU Control Thermostat Installation 

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(c)  Connect the door support rods.
 S 014-004
 CAUTION:_______BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD. DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
 (3)  Remove the lower shroud:
 (a)  
Hold the lower shroud and open the shroud latches.

 (b)  
Remove the lower shroud.

 S 024-005
 (4)  Remove the APU control thermostat:
 (a)  
Disconnect the control air line from the APU control thermostat.

 (b)  
Remove the bolt and the washer that attach the APU control thermostat to the mounting flange.

 (c)  
Carefully remove the APU control thermostat from the mounting flange.

 TASK 49-52-32-404-006
 3.  APU Control Thermostat Installation (Fig. 401)___________________________________
 A. Consumable Materials
 (1)  D00010 Compound - Antiseize, MIL-A-907, Fel-Pro C-5A
 B. References
 (1)  
AMM 49-11-00/501, APU Power Plant

 (2)  
AMM 49-52-32/501, APU Control Thermostat

 (3)  
IPC 49-50-01 Fig. 1

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

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

 D. Procedure
 S 424-007
 (1)  Install the APU control thermostat:
 (a)  Install the APU control thermostat in the mounting flange.
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(b)  
Apply a layer of the antiseize compound to the threads of the bolt.

 (c)  
Install the bolt and the washer.

 1)  Tighten the bolt to 50-70 pound-inches
 (5.7-7.9 newton-meters).

 CAUTION: DO NOT USE A WRENCH ON THE THERMOSTAT ADJUSTMENT COLLAR OR
_______ THE BODY WHEN YOU CONNECT THE CONTROL AIR LINE. THIS CAN CAUSE THE THERMOSTAT ADJUSTMENT TO CHANGE WHICH CAN PERMIT THE APU TO BECOME TOO HOT.
 (d)  Connect the control air line to the APU control thermostat.
 S 714-008
 (2)  Do the APU operation test (AMM 49-11-00/501).
 (a)  If the EGT is not between 620-649°C, adjust the APU control thermostat (AMM 49-52-32/501).
 S 414-009
 CAUTION: KEEP A MINIMUM CLEARANCE OF 0.18 INCHES (5 MM) BETWEEN THE
_______ ENGINE, THE FIRE DETECTOR, THE CLAMPS, AND THE LOWER SHROUD.
 BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD, DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
　
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