Operational Test of the Skin Temperature Sensor (without the CFDS)

TASK 21-26-13-710-001-A
Operational Test of the Skin Temperature Sensor (without the CFDS)

FIN: 28HQ

1. Reason for the Job
To do the test after the removal/installation of the skin temperature sensor 28HQ if the CFDS is unserviceable.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
822

C. 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 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure

3. Job Set-up
Subtask 21-26-13-865-053-A

A. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR COND/AVNCS VENT/CTL	6HQ	D06
49VU	AIR COND/AVNCS VENT/CTL	5HQ	D05
122VU	AIR COND/AVNCS/VENT/MONG	3HQ	Y17
** ON A/C NOT FOR ALL
123VU	AVNCS VENT/EXTC/FAN	2HQ	AE02
** ON A/C ALL
123VU	AVNCS VENT/BLOWER/FAN	1HQ	AD10
** ON A/C NOT FOR ALL
123VU	AVNCS VENT/EXTC/FAN	2HQ	AC04

Subtask 21-26-13-869-052-A

B. Make sure that the throttle control levers of the engines 1 and 2 are at idle.

Subtask 21-26-13-861-052-A

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

Subtask 21-26-13-869-053-A

D. On the VENTILATION section of the panel 22VU:

make sure that the BLOWER and EXTRACT pushbutton switches are in the AUTO configuration (pushed with the FAULT and OVRD legends off).

Subtask 21-26-13-860-052-A

E. Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).

Subtask 21-26-13-010-051-A

F. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 822.
(2) Open the access door 822.

4. Procedure
Subtask 21-26-13-710-051-A

A. Operational Test of the Skin Temperature Sensor (28HQ)

ACTION	RESULT
1.In the lateral avionics compartment: disconnect the connector 28HQ-A from the skin temperature sensor 28HQ.	The flight configuration is simulated for the ventilation system. On the aircraft skin, make sure that: the skin air-inlet valve 15HQ is closed. the small flap only of the skin air-outlet valve 22HQ is open (the main flap stays closed).
2.Connect the connector 28HQ-A to the skin temperature sensor 28HQ.	No change.
3.On the rear circuit breaker panel 122VU: open then close the circuit breaker 3HQ.	NOTE: This starts a full test of the ventilation system.
4.Wait until the end of the test	On the aircraft skin, make sure that: the skin air-inlet valve 15HQ is open. the skin air-outlet valve 22HQ is open.

5. Close-up
Subtask 21-26-13-410-051-A

A. Close Access
(1) Close the access door 822.
(2) Remove the access platform(s).

Subtask 21-26-13-860-051-A

B. Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002)

Subtask 21-26-13-862-052-A

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

[Rev.10 from 2021] 2026.04.02 06:47:57 UTC