Installation of the High Pressure Turbine Clearance Control (HPTCC) Sensor [CFMI]

TASK 73-21-70-400-001-A
Installation of the High Pressure Turbine Clearance Control (HPTCC) Sensor

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

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

REFERENCE	QTY	DESIGNATION
No specific	1	FEELER - STOCK
No specific	AR	PLIERS - JAWED, SOFT
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 70 and 55 lbf.in (0.79 and 0.62 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2101)	graphite grease
(Material No.CP8001)	lockwire 0.032 in. (0.8 mm) dia.
(Material No.CP8002)	lockwire 0.032 in. (0.8 mm) dia

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
30	GASKET	AIPC 73-21-70-01-050

E. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-32-00-860-012-A	Procedure to Get Access to the SYSTEM REPORT/TEST/ENG Page
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 73-29-00-710-040-A-02	Operational Test of the FADEC on the Ground (with Engine non Motoring)
TASK 78-30-00-081-041-A	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors

3. Job Set-up
Subtask 73-21-70-860-050-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 73-21-70-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser doors are open: (Ref. AMM TASK 78-36-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 73-21-70-040-051-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser is unserviceable (Ref. AMM TASK 78-30-00-481-041).

4. Procedure
Subtask 73-21-70-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the HPTCC Sensor:
(1) Remove protective caps and plugs from the port or the CDN and the probe of the sensor (40).
(2) Install the new AIPC 73-21-70-01-050 GASKET (30) on the sensor (40).
(3) Engage the sensor as follows:

CAUTION: THE SMALL POINT OF THE HPTCC SENSOR PROBE MUST FIT INTO THE HOLE WITHIN THE HPT SHROUD SUPPORT. FAILURE TO ENGAGE THE SENSOR INTO THE SHROUD SUPPORT WILL RESULT IN DAMAGE TO THE SENSOR.

(a) Point the electrical connector of the sensor (40) forward, and install the new gasket (30) and the sensor (40) on the CDN. Turn the sensor until it engages into the HPT shroud support.
(4) Do not install the attachment bolts (10) at this time.
(5) Measure the gap between the flange of the sensor (40) and the surface of the CDN with FEELER - STOCK. The gap must be 0.17 in. (4.32 mm) or less, to show that the probe is correctly installed in the shroud support.
(6) If the gap is more than 0.17 in. (4.32 mm) apply light pressure to the sensor while you turn it.
(7) Measure the gap again. If necessary, do step (6) again until the gap i1 in limits.
(8) Lubricate the threads and friction surfaces of the bolts (10) with graphite grease (Material No.CP2101) .
(9) Install the washers (20) and the attachment bolts (10).
(10) TORQUE the bolts (10) to between 70 and 55 lbf.in (0.79 and 0.62 m.daN )

.
(11) Wirelock the bolts (10) with CP8001lockwire 0.032 in. (0.8 mm) dia. or CP8002lockwire 0.032 in. (0.8 mm) dia.
(12) Connect the electrical connector (50) to the sensor (40). Tighten the connector by hand plus one-eighth of a turn. If necessary, use PLIERS - JAWED, SOFT.

Subtask 73-21-70-861-050-A ** ON A/C NOT FOR ALL

B. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 73-21-70-410-051-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors : (Ref. AMM TASK 78-36-00-410-040)
(3) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(4) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 73-21-70-440-050-A ** ON A/C NOT FOR ALL

D. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041)

Subtask 73-21-70-710-050-A ** ON A/C NOT FOR ALL

E. Do this test:
(1) Do a FADEC ground test (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040)
(2) On the left or right MCDU, get the SYSTEM REPORT/TEST page (Ref. AMM TASK 31-32-00-860-012).
(3) Push the line key adjacent to the FADEC 1A(1B) for engine 1.
(4) Push the line key adjacent to the FADEC 2A(2B) for engine 2.
(5) Make sure that the message "TC SENS, J13, ECU" is not in view.

Subtask 73-21-70-862-050-A ** ON A/C NOT FOR ALL

F. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

5. Close-up
Subtask 73-21-70-410-050-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) Close the fan cowl doors : (Ref. AMM TASK 71-13-00-410-040)
(3) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(4) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(5) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:56:57 UTC