# SDR UALA2013010400057

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 3, 2013
- Submitted: January 29, 2013
- Operation: Air carrier
- Aircraft: [N473UA](https://openairdocs.org/aircraft/N473UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1469
- Aircraft time: 39,034 hours, 15,972 cycles
- Engine: Iae V2527A5
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Bypass Valve
- Part number: 1312A000001
- Part serial: 786
- Condition: Faulty
- Location: Cabin Temp
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2013010400057

## Discrepancy

UNABLE TO GET CABIN FWD AND AFT ABOVE 68 DEGREES WITH BOTH FWD AND AFT CONT SET AT FULL WARM.   SAMC TEXT: DUE TO LAST LEG REPORT OF P2 BYPASS VALVE FAULT, CHANGE 30HH BYPASS VALVE REF AMM  21-61-53, PCN 644-9042.  REPLACED TURBINE BYPASS VALVE ON NUMBER 2 PACK PER MM.  LEAK TEST OK AND ACP CAB TEST, TEST PASSED.

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