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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 ////////////////////////
(b)  Apply a thin layer of the grease to the input shaft on the tachometer generator.
 CAUTION: MAKE SURE THE INPUT SHAFT IS CORRECTLY ENGAGED BEFORE YOU
_______ MOVE THE TACHOMETER GENERATOR ON THE MOUNTING STUDS. DAMAGE TO THE GENERATOR CAN OCCUR IF THE GEARS ARE NOT CORRECTLY ENGAGED.
 (c)  
Engage the generator input shaft with the drive shaft of the accessory gear drive.

 (d)  
Move the tachometer generator on the mounting studs.

 (e)  
Install the washers and the nuts that attach the tachometer generator to the mounting pad. 1) Tighten the nuts to 70-90 pound-inches

 (7.9-10.2 newton-meters).

 (f)  
Connect the electrical connector to the tachometer generator.

 S 414-008
 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.
 (2)  Install the lower shroud: (a) Hold the lower shroud against the upper shroud. (b) Close the shroud latches.
 S 414-009
 (3)  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 on the APU cowl door.
 S 864-010
 (4)  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

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(b)  Remove the DO-NOT-OPERATE tag from the APU master switch on the P5 forward overhead panel.
 S 714-011
 (5)  Do an operational check of the tachometer generator:
 (a)  
Start and operate the APU (AMM 49-11-00/201).

 (b)  
Make sure the APU operates correctly.

 (c)  
Do the APU usual shutdown (AMM 49-11-00/201).

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ELECTRONIC TEMPERATURE CONTROL - REMOVAL/INSTALLATION
_____________________________________________________
 1.  General
_______
 A.  This procedure contains the removal and the installation tasks for the electronic temperature control (ETC).
 B.  The ETC is in the equipment bay in the aft cargo compartment. You can get access to the ETC through the door for the aft cargo compartment.
 TASK 49-61-71-004-001
 2.  Electronic Temperature Control (ETC) Removal (Fig. 401)
____________________________________________
 A.  Access
 (1)  
Location Zones
 102 Flight Compartment, RH
 220 Aft Cargo Compartment Equipment Bay

 (2)  
Access Panels
 4504R Aft Cargo Compartment Door

 B.  Procedure
 S 864-002
 (1)  Set the switches and the circuit breakers:
 (a)  
Set the APU master switch on the P5 forward overhead panel to OFF and attach a DO-NOT-OPERATE tag.

 (b)  
Set the BATTERY switch to OFF and attach a DO-NOT-OPERATE tag.

 (c)  
Open these circuit breakers on the P6 circuit breaker panel and attach DO-NOT-CLOSE tags: 1) APU CONT 2) APU GCU 3) HOT BATT BUS 4) BATT BUS

 S 014-003
 (2)  
Open the door for the aft cargo compartment.

 S 024-004

 (3)  
Remove the ETC:

 (a)  
Remove the seven bolts and the washers that attach the ETC cover to the cargo compartment ceiling. 1) Remove the ETC cover.
　
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