DOC AIRBUS | AMM A320FInstallation of the T12 Temperature Sensor [CFMI]
TASK 73-21-40-400-040-A
Installation of the T12 Temperature Sensor
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 73-21-40-860-051-A ** ON A/C NOT FOR ALL
Subtask 73-21-40-420-051-A ** ON A/C NOT FOR ALL
Subtask 73-21-40-410-051-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:56:07 UTC
Installation of the T12 Temperature Sensor
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP1039) | acetone |
| (Material No.CP1041) | isopropyl alcohol |
| (Material No.CP2244) | primer 1200 |
| (Material No.CP2497) | DC93-006 |
| (Material No.CP2559) | ardrox 552 |
| (Material No.CP2560) | turco ind 79 |
| (Material No.CP2566) | mag-chem teksol |
| (Material No.CP2584) | degreasol 99 R |
| (Material No.CP2656) | mag-chem skysol |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| No specific | aluminum oxide abrasive paper 320 grit |
| No specific | masking tape 2 in. (50.08 mm) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-00-00-710-006-A | Minimum Idle Check |
| 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) |
T12 SensorSubtask 73-21-40-860-051-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) is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE is in position.
(4) Make sure that MAT - PROTECTIVE is in position.
Subtask 73-21-40-010-053-A ** ON A/C NOT FOR ALL (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) is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE is in position.
(4) Make sure that MAT - PROTECTIVE is in position.
B. Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 73-21-40-420-051-A ** ON A/C NOT FOR ALL
A. Installation of the T12 Temperature Sensor.
(1) Install the T12 sensor into the support bracket on the inlet cowl.
(2) Secure the T12 sensor to the support bracket using 4 bolts and washers. TORQUE the bolts to between 1.2 and 1.1 m.daN (106.19 and 97.35 lbf.in )
(3) Remove the blanking cap from the electrical connectors and the blanking plug from the sensor housing.
(4) Install the electrical connectors on the sensor housing .
(5) Install the housing strip on the sensor housing.
(6) Install the nut and washer which secure the bonding strip to the sensor housing. TORQUE the nut to between 0.47 and 0.43 m.daN (41.59 and 38.05 lbf.in ).
Subtask 73-21-40-914-050-A ** ON A/C NOT FOR ALL (1) Install the T12 sensor into the support bracket on the inlet cowl.
(2) Secure the T12 sensor to the support bracket using 4 bolts and washers. TORQUE the bolts to between 1.2 and 1.1 m.daN (106.19 and 97.35 lbf.in )
(3) Remove the blanking cap from the electrical connectors and the blanking plug from the sensor housing.
(4) Install the electrical connectors on the sensor housing .
(5) Install the housing strip on the sensor housing.
(6) Install the nut and washer which secure the bonding strip to the sensor housing. TORQUE the nut to between 0.47 and 0.43 m.daN (41.59 and 38.05 lbf.in )
. B. Apply a bead of aerodynamic sealant to the gap between the T12 sensor and the inner barrel of the inlet cowl as follows:
(1) Remove all loose or damage sealant with a SPATULA - PLASTIC.
(2) Use aluminum oxide abrasive paper 320 grit or finer to make the surfaces of the joint rough where the primer and the sealant will be applied.
(4) Wipe the surfaces dry with a clean, dry, lint-free cloth.
(5) Put masking tape 2 in. (50.08 mm) on the inlet cowl around the circumference of the T12 sensor hole.
(7) Use a BRUSH - NYLON to apply a thin coat of primer 1200 (Material No.CP2244) to the joint.
(8) Let the primer air dry for a minimum of 20 minutes at 72 deg.F (22.22 deg.C) - 82 deg.F (27.78 deg.C) before DC93-006-1 sealant is applied.
(10) Apply a bead of DC93-006 (Material No.CP2497) to the joint of the inlet cowl and T12 sensor.
(11) Cure the sealant for 10 hours at 72 deg.F (22.22 deg.C) - 82 deg.F (27.78 deg.C) at a relative humidity of 50 percent or more.
Subtask 73-21-40-869-055-A ** ON A/C NOT FOR ALL (1) Remove all loose or damage sealant with a SPATULA - PLASTIC.
(2) Use aluminum oxide abrasive paper 320 grit or finer to make the surfaces of the joint rough where the primer and the sealant will be applied.
CAUTION:
METHYL ETHYL KEYTONE (MEK) IS CLASSIFIED AS A DANGEROUS MATERIAL WHICH CAN CAUSE INJURY OR ILLNESS IF IT IS NOT CORRECTLY USED. REFER TO THE MANUFACTURER'S SPECIFIC SAFETY AND HEALTH RECOMMENDATIONS BEFORE YOU USE THIS PRODUCT. CAREFULLY READ THE APPLICABLE "MATERIAL SAFETY DATA SHEET" AND OBEY ALL SAFETY AND HEALTH PRECAUTIONS.
(3) Clean the surfaces of the joint with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with acetone (Material No.CP1039) or ardrox 552 (Material No.CP2559) or turco ind 79 (Material No.CP2560) or mag-chem teksol (Material No.CP2566) or degreasol 99 R (Material No.CP2584) or mag-chem skysol (Material No.CP2656) or isopropyl alcohol (Material No.CP1041) . (4) Wipe the surfaces dry with a clean, dry, lint-free cloth.
(5) Put masking tape 2 in. (50.08 mm) on the inlet cowl around the circumference of the T12 sensor hole.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(6) Mix the primer 1200 (Material No.CP2244) according to the manufacturer's instructions. (7) Use a BRUSH - NYLON to apply a thin coat of primer 1200 (Material No.CP2244) to the joint.
(8) Let the primer air dry for a minimum of 20 minutes at 72 deg.F (22.22 deg.C) - 82 deg.F (27.78 deg.C) before DC93-006-1 sealant is applied.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(9) Mix the DC93-006 base and the DC93-006-1 catalyst per the manufacturer's instructions. (10) Apply a bead of DC93-006 (Material No.CP2497) to the joint of the inlet cowl and T12 sensor.
(11) Cure the sealant for 10 hours at 72 deg.F (22.22 deg.C) - 82 deg.F (27.78 deg.C) at a relative humidity of 50 percent or more.
CAUTION:
THE CURE TEMPERATURE IS NOT TO EXCEED 120°F (49°C). A RELATIVE HUMIDITY OF LESS THAN 50 PERCENT WILL REQUIRE LONGER CURE TIME.
(12) As an alternate cure, cure the sealant for 2 hours at 72 deg.F (22.22 deg.C) - 82 deg.F (27.78 deg.C) (gel time), then cure the sealant for 2 hours at 100 deg.F (37.78 deg.C) - 120 deg.F (48.89 deg.C) at a relative humidity of 50 percent or more. C. Make sure that the work area is clean and clear of tools and other items.
Subtask 73-21-40-942-053-A ** ON A/C NOT FOR ALL D. Put the aircraft back to its initial configuration.
(1) Remove the MAT - PROTECTIVE mat from the inlet cowl.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
Subtask 73-21-40-710-051-A ** ON A/C NOT FOR ALL Subtask 73-21-40-710-051-B ** ON A/C NOT FOR ALL 5. Close-up(1) Remove the MAT - PROTECTIVE mat from the inlet cowl.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
Subtask 73-21-40-410-051-A ** ON A/C NOT FOR ALL