TASK 49-71-21-004-001
2. Exhaust Gas Temperature Thermocouple Probe Removal (Fig. 401)__________________________________________________
A. 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
B. 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 support rods.
S 034-005
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 024-006
(4) Remove the thermocouple probe of the exhaust gas temperature:
(a)
Disconnect the leads from the thermocouple probe terminals.
(b)
Remove the bolts and washers that attach the thermocouple probe.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITHOUT THE ETC ú
49-71-21
ú ú 02 Page 401 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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 ////////////////////////
SEE B
SEE A
A
THERMOCOUPLE
PROBE FOR THE
EXHAUST GAS
TEMPERATURE
TURBINE
EXHAUST
PORT
FLANGE ON THE TURBINE EXHAUST PORT
HARNESSBOLTS ATTACH BALANCE RESISTOR
1
THERMOCOUPLE LEADS
FWD
B 1
NOT ON ALL AIRPLANES
Exhaust Gas Temperature Thermocouple Probe Installation Figure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITHOUT THE ETC ú
49-71-21
ú ú 01 Page 402 ú Nov 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
TASK 49-71-21-404-007
3. Exhaust Gas Temperature Thermocouple Probe Installation (Fig. 401)
_______________________________________________________
A. Consumable Materials
(1) A00849 Compound - Antiseize, Fel-Pro C-5A (AMM 20-30-21/201)
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 724-009
(1)
Do a test on the thermocouple probe (AMM 49-71-21/501).
S 424-008
(2)
Install the thermocouple probe of the exhaust gas temperature:
(a) Put the thermocouple probe into the flange of the turbine exhaust port.
NOTE: Make sure the small (chromel) terminal on the probe
____ points in the aft direction.
(b)
Apply a layer of antiseize compound to the attach bolts for the thermocouple probe.
(c)
Install the bolts with the washers.
(d)
Connect the alumel (green) lead to the larger terminal and the chromel (white) lead to the smaller terminal of the thermocouple probe.
S 414-013
CAUTION: KEEP A MINIMUM CLEARANCE OF 0.18 INCH (5 MM) BETWEEN THE
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