# SDR CALA2021080901303

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2021
- Submitted: August 9, 2021
- Operation: Air carrier
- Aircraft: [N472UA](https://openairdocs.org/aircraft/N472UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1435
- Aircraft time: 63,305 hours, 26,110 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Control Valve
- Condition: Malfunctioned
- Location: Cabin Temp
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2021080901303

## Discrepancy

CABIN TEMPS UNCONTROLLABLE ON CLIMBOUTCOCKPIT 136 TOMC UPDATE: CREW ADVISED VIA ACARS PACK 1 OUTLET TEMP MUCH HIGHER THAN PACK 2 OVER 10 DEG, TOMC ADVISED CREW TO TURN OFF PACK WITH HIGHEST OUTLET TEMP (PACK 1) CREW REPLIED THE TEMPS STARTED TO DROP. TOMC SUSPECTS ISSUE WITH PACK 1 DEBRIEF AND PICTURES OF CONDITION PAGE SHOW 138 DEGREES OUTPUT POST FLT REPORT HIT "PH 02 21-51-51 P1 FLOW CONT VLV". CREW TO FLIGHT DECK WITH FLT DECK TRIM VALVE AT FULL COLD POSITION. REQUEST DEFERRAL PER MEL 2152Y. DISPATCH DESK: 013  NAME: GB DATE: 06-AUG-21- NOC DESK: 320  NAME: MK DATE: 06-AUG-21- APPROVED MEL 2152Y TOMC UPDATE CORRECTION: TOMC SPOKE WITH CREW VIA TELEPHONE AND IN FLIGHT , CREW DID REPORT TEMPS WENT TO NORMAL AFTER DECENT , CORRECTION ON PREVIOUS UPDATE FLIGHT CREW NEVER SHUT OFF PACK 1 CFDS SHOWS PACK 1 FLOW CONTROL FAULT IN WHICH PACK 1 IS AT FAULT NOT DISPLAYED.  PLACARD INSTALLED.  DEFERRED PER MEL 2152Y. PACK FLOW CONTROL VALV VERIFIED CLOSED.  COND ZONE REG FAULTS REMOVED AND REPLACED #1 PACK FLOW CONTROL VALVE IAW AMM 21-51-51.

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