(b)
Close the shroud latches.
S 414-011
(4) 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.
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ú ú 02 Page 403 ú Nov 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES/MAINTENANCE MANUAL ////////////////////////
S 864-012
(5) 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.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
EXHAUST GAS TEMPERATURE THERMOCOUPLE PROBE - ADJUSTMENT/TEST
____________________________________________________________
1. General
_______
A. This procedure contains a task to do a test on the thermocouple probe for the exhaust gas temperature.
TASK 49-71-21-705-004
2. Exhaust Gas Temperature Thermocouple Probe Test
_______________________________________________
A. Standard Tools and Equipment
(1) Iron - Soldering, 500 Watt capacity
B. References
(1)
AMM 20-10-27/201, Heat Guns, Soldering Guns, Soldering Irons
(2)
AMM 49-71-21/401, Exhaust Gas Temperature Thermocouple Probe
C. Access
(1)
Location Zones
703 APU Compartment
(2)
Access Panels
3804 APU Cowl Door
D. Procedure
S 025-002
(1)
Remove the probe from the engine (AMM 49-71-21/401).
S 725-001
(2)
Do a test on the thermocouple probe for the exhaust gas temperature.
WARNING: DO NOT USE HEAT GUNS, SOLDERING GUNS, AND SOLDERING IRONS
_______ IN FUEL GASES (AMM 20-10-27/201). THIS CAN CAUSE AN EXPLOSION AND DAMAGE TO EQUIPMENT AND INJURY TO PERSONS.
(a) Put the hot soldering iron on the thermocouple probe.
NOTE: Make sure you put the soldering iron on the center of
____ the thermocouple probe. This will supply the most heat to the probe.
(b)
Make sure the temperature increases on the indicator for the exhaust gas temperature.
(c)
If the temperature does not increase, do the steps that follow: 1) If the pointer on the indicator does not move, replace the thermocouple probe.
2) If the indicator decreases in temperature, the probe operates correctly but you connected the leads incorrectly.
(d)
Disconnect leads to the thermocouple probe.
S 425-003
(3) Install the thermocouple probe on the engine (AMM 49-71-21/401).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
ETC THERMOCOUPLE PROBE - REMOVAL/INSTALLATION
_____________________________________________
1. General_______
A. This procedure contains the removal and installation tasks for the ETC
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