49-31-31
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////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES/MAINTENANCE MANUAL ////////////////////////
2) Replace the fuel solenoid valve (AMM 49-31-31/401). 3) Do the fuel solenoid valve test again.
(c) If the APU does shut down with the circuit breaker open, do the following: 1) Remove the DO-NOT-CLOSE tag and close this circuit breaker:
a) E3-3 Electrical Shelf, APU Control Unit
S 865-004
(3) Do the APU usual shutdown (AMM 49-11-00/201).
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49-31-31
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
COMBUSTOR UNIT - REMOVAL/INSTALLATION
_____________________________________
1. General_______
A. This procedure gives the tasks to remove and to install the combustor unit. The combustor unit has the igniter plug, fuel drain union, fuel atomizer, combustor chamber cap and combustion chamber. These components are removed and installed as a unit.
TASK 49-31-42-004-001
2. Combustor Unit Removal (Fig. 401)______________________
A. Standard Tools and Equipment
(1) Container - for fuel
B. Access
(1)
Location Zones
101 Control Cabin, LH
205 Electronic Compartment
703 APU Compartment
(2)
Access Panels
1201 Electronic Equipment Access Door
3804 APU Cowl Door
C. Procedure
S 864-002
(1) Set the switch and the circuit breaker:
(a)
Set the APU master switch, on the P5 forward overhead panel, to the OFF position and attach a DO-NOT-OPERATE tag.
(b)
Open this circuit breaker and attach a DO-NOT-CLOSE tag: 1) E3-3 Electrical Shelf, APU Control Unit
S 014-003
(2) Open the APU cowl door:
(a)
Open the latches for the APU cowl door.
(b)
Open the APU cowl door.
(c)
Connect the door suppport 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.
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////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE A
TURBINE PLENUM PACKING
COUPLING
COMBUSTION CHAMBER
CHAMBER CAP COMBUSTION
IGNITER PLUG FUEL ATOMIZER
UNION FUEL DRAIN A FWD FUEL LINE FITTING
Figure 401 (Sheet 1) Combustor Unit Installation
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SEE B
SEE A
FWD
A
FUEL
SOLENOID
VALVE
ELECTRICAL ELECTRICAL
CONNECTOR CONNECTOR
FUEL CONTROL
UNIT
FWD FUEL
HIGH PRESSURE SOLENOID
FUEL
FUEL LINE VALVE CONTROL
INBD (TO FUEL ATOMIZER)
UNIT
HIGH PRESSURE FUEL LINE B 1 (TO FUEL ATOMIZER)
B2
1 AIRPLANES WITHOUT THE TAFCU
2 AIRPLANES WITH THE TAFCU
Combustor Unit Installation Figure 401 (Sheet 2)
G16266
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