DOC AIRBUS | TSM A320FWarning of the Avionics-Ventilation Comfort Duct-Temperature-Sensor Inoperative
TASK 21-26-00-810-846-A
Warning of the Avionics-Ventilation Comfort Duct-Temperature-Sensor Inoperative
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 21-26-00-710-129-A ** ON A/C NOT FOR ALL
Subtask 21-26-00-810-100-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:24:39 UTC
Warning of the Avionics-Ventilation Comfort Duct-Temperature-Sensor Inoperative
1. Possible Causes
- SENSOR-DUCT TEMP, AVNCS VENT COMFORT [34HQ]
wiring between the AEVC (10HQ) and the comfort duct temperature-sensor (34HQ), - AEVC [10HQ]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 21-26-00-710-001 | Operational Check of the Avionics Equipment Ventilation-System via MCDU |
| AMM 21-26-00-710-008 | Operational Test to Read the CFDS for CLASS 3 Faults of the AEVC |
| AMM 21-26-00-710-009 | Operational Test to Read the CFDS for LAST LEG REPORT of the AEVC |
| ASM 212603 | |
| AMM 21-26-12-000-802 | Removal of the Avionics-Ventilation Comfort Duct-Temperature-Sensor |
| AMM 21-26-12-400-802 | Installation of the Avionics-Ventilation Comfort Duct-Temperature-Sensor |
| AMM 21-26-34-000-001 | Removal of the Avionics Equipment Ventilation Computer (AEVC) |
| AMM 21-26-34-400-001 | Installation of the Avionics Equipment Ventilation Computer (AEVC) |
Subtask 21-26-00-710-129-A ** ON A/C NOT FOR ALL
A. Test
(1) Do a reset of the AEVC (10HQ).
(a) Open circuit breaker AIR COND/AVNCS/VENT/MONG (3HQ).
(b) Wait for five seconds.
(c) Close circuit breaker AIR COND/AVNCS/VENT/MONG (3HQ).
(2) Do the operational test of the avionics equipment ventilation from the Multipurpose Control and Display Unit (MCDU) AMM 21-26-00-710-001.
(3) Read the LAST LEG REPORT of the AEVC AMM 21-26-00-710-009.
(4) Read the CLASS 3 faults of the AEVC AMM 21-26-00-710-008.
4. Fault Isolation(1) Do a reset of the AEVC (10HQ).
(a) Open circuit breaker AIR COND/AVNCS/VENT/MONG (3HQ).
(b) Wait for five seconds.
(c) Close circuit breaker AIR COND/AVNCS/VENT/MONG (3HQ).
(2) Do the operational test of the avionics equipment ventilation from the Multipurpose Control and Display Unit (MCDU) AMM 21-26-00-710-001.
(3) Read the LAST LEG REPORT of the AEVC AMM 21-26-00-710-009.
(4) Read the CLASS 3 faults of the AEVC AMM 21-26-00-710-008.
Subtask 21-26-00-810-100-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message AV COMF SENSOR 34HQ:
Subtask 21-26-00-710-130-A ** ON A/C NOT FOR ALL - Replace SENSOR-DUCT TEMP, AVNCS VENT COMFORT [34HQ] AMM 21-26-12-000-802 AMM 21-26-12-400-802.
- Do a check of the
wiring between the AEVC (10HQ) and the comfort duct temperature-sensor (34HQ), ASM 212603.
. Pin AB/11B and pin A/C
- Repair the related wiring.
- Replace AEVC [10HQ] AMM 21-26-34-000-001 AMM 21-26-34-400-001.
B. Do the operational test given in Para. 3.