Installation of the Fuel Temperature Thermocouple [IAE]

TASK 73-35-15-400-010-B
Installation of the Fuel Temperature Thermocouple

CAUTION: DO NOT LET ENGINE FUEL OR OIL FALL ON THE ENGINE. UNWANTED FUEL OR OIL MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FUEL OR OIL CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 18 and 15 lbf.in (0.20 and 0.17 m.daN )
No specific	Torque wrench: range to between 22 and 18 lbf.in (0.25 and 0.20 m.daN )
No specific	Torque wrench: range to between 44 and 36 lbf.in (0.50 and 0.41 m.daN )
No specific	Torque wrench: range to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )
No specific	Torque wrench: range to between 120 and 110 lbf.in (1.36 and 1.24 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-002)	cleaning fluid
(Material No.V02-126)	lockwire
(Material No.V10-077)	lubricant (engine oil)
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
6	SEALING RING	AIPC 73-12-42-80-070
4	RING	AIPC 73-35-15-80-040

E. Referenced Information

REFERENCE	DESIGNATION
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 70-23-13-911-010-A	Procedures for the Installation of Preformed Packings
TASK 70-23-15-912-010-A	Connection of Electrical Connectors
TASK 71-00-00-710-012-B	Test No.3 : Idle Leak Check
TASK 71-00-00-710-045-A	Test No.1 : Dry Motor Leak Check
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 73-22-00-710-040-A	Operational Test of the FADEC SYSTEM on the Ground
Fuel Temperature Thermocouple
Fuel Temperature Thermocouple - SBE 73-0071

3. Job Set-up
Subtask 73-35-15-860-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).

Subtask 73-35-15-010-053-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-010)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 73-35-15-630-051-A ** ON A/C NOT FOR ALL

C. Remove the covers from the openings.

4. Procedure
Subtask 73-35-15-420-051-A ** ON A/C NOT FOR ALL

A. Installation of the Fuel Temperature Thermocouple

PRE SBE 71-0183
PRE SBE 73-0071

(1) Install the fuel temperature thermocouple in the Fuel Cooled Oil Cooler (FCOC).

Fuel Temperature Thermocouple ** ON A/C NOT FOR ALL

(a) Lubricate the new ring (4) with clean V10-077lubricant (engine oil).
(b) Install the AIPC 73-35-15-80-040 RING (4) on the thermocouple (1) (Ref. AMM TASK 70-23-13-911-010).
(c) Install the thermocouple with the ring on the FCOC.
(d) Install the two bolts (3).
(e) TORQUE the bolts to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(f) Connect the electrical connector (2) (Ref. AMM TASK 70-23-15-912-010).

Subtask 73-35-15-420-052-A ** ON A/C NOT FOR ALL

B. Installation of the Fuel Temperature Thermocouple

SBE 71-0183: Powerplant - Electrical harnesses - Introduction of production standard EEC harness to suit FCOC fuel temperature thermocouple with stud type thermocouple

SBE 73-0071: Fuel Temperature Thermocouple with stud and nut terminations.

(1) Install the fuel temperature thermocouple on the Fuel Cooled Oil Cooler (FCOC).

NOTE: Make sure that the larger studs are at the top of the unit before tightening the bolts.

Fuel Temperature Thermocouple ** ON A/C NOT FOR ALL

Fuel Temperature Thermocouple - SBE 73-0071 ** ON A/C NOT FOR ALL

(a) Lubricate the new AIPC 73-35-15-80-040 RING (4) with clean V10-077lubricant (engine oil).
(b) Install the AIPC 73-35-15-80-040 RING (4) on the thermocouple (1) (Ref. AMM TASK 70-23-13-911-010).
(c) Install the thermocouple with the ring on the FCOC and install the two bolts (3). Tighten the two bolts to hold the thermocouple in position.

NOTE: Make sure that the larger studs are at the top of the unit before tightening the bolts.

(d) Connect the electrical connector (2) 4017KS-A (Ref. AMM TASK 70-23-15-912-010) and

Fuel Temperature Thermocouple - SBE 73-0071 ** ON A/C NOT FOR ALL

(e) If the thermocouple is not to be removed, remove and install the thermocouple securing bolts (3) one at a time.
(f) Remove the two bolts (3) that secure the thermocouple to the FCOC.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

(g) Remove the grease, the fingerprints and the unwanted material from the mating surfaces of the ground terminals and thermocouple earth positions with cleaning fluid (Material No.V01-002) inhibited and stabilized trichloroethane. Use a clean lint free cotton cloth Textile-Lint free Cotton - (Material No.14SBA1) moistened with the solvent.
(h) Install the harness ground terminal connectors on the two bolts (3). Install the two bolts (3).
(i) TORQUE the two bolts (3) to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

CAUTION: YOU MUST NOT EXCEED THE RECOMMENDED TORQUE VALUES. OVER TORQUING CAN RESULT IN FRACTURE OF THE THERMOCOUPLE STUDS.

(j) Install channel A and B thermocouple lead assemblies on the fuel temperature thermocouple studs. Install the two nuts (9) on the top studs. Install the two nuts (8) on the bottom studs.
(k) TORQUE the two nuts (9) to between 22 and 18 lbf.in (0.25 and 0.20 m.daN )

.
(l) TORQUE the two nuts (8) to between 18 and 15 lbf.in (0.20 and 0.17 m.daN )

.
(m) Adjust the harness clips as necessary to obtain the correct clearance and drip loop. TORQUE the clip bolt/nut to between 44 and 36 lbf.in (0.50 and 0.41 m.daN )

Subtask 73-35-15-420-053-A ** ON A/C NOT FOR ALL

C. Installation of the fuel drain plug

Fuel Temperature Thermocouple ** ON A/C NOT FOR ALL

(1) Install the fuel drain plug:
(a) Lubricate the new AIPC 73-12-42-80-070 SEALING RING (6) with clean V10-077 engine oil (Ref. 70-30-00).
(b) Install the sealing ring on the drain plug (5) (Ref. AMM TASK 70-23-13-911-010).
(c) Install the drain plug with the sealing ring on the FCOC.
(d) TORQUE the drain plug to between 120 and 110 lbf.in (1.36 and 1.24 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(e) Safety the drain plug (5) with lockwire (Material No.V02-126) .

5. Close-up
Subtask 73-35-15-410-051-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).
(3) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 73-35-15-790-051-A ** ON A/C NOT FOR ALL

B. Test Requirements
(1) Do an operational test of the FADEC (Ref. AMM TASK 73-22-00-710-040) and make sure that, on CFDS, no fault related to the Fuel Temperature Thermocouple is shown.
(2) Do an idle leak check (Ref. AMM TASK 71-00-00-710-012).

NOTE: A dry motor leak check (Ref. AMM TASK 71-00-00-710-045) may be used to check for leaks, but this must be followed by an idle leak check (Ref. AMM TASK 71-00-00-710-012).

[Rev.10 from 2021] 2026.04.01 03:01:45 UTC