# SDR AALA201710119045

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 9, 2017
- Submitted: October 12, 2017
- Operation: Air carrier
- Aircraft: [N762AN](https://openairdocs.org/aircraft/N762AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 31479
- Aircraft time: 63,862 hours, 7,590 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Bypass Valve
- Condition: Failed
- Location: Engine
- Stage of operation: CR
- 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/AALA201710119045

## Discrepancy

FLIGHT DIVERTED DUE TO A LEFT AIR CONDITIONING PACK FAILED AND THE COCKPIT TEMPERATURE WOULD NOT GO ABOVE 50 DEGREES.  LANDING UNEVENTFUL.  REMOVED AND REPLACED SECOND STAGE TURBINE BYPASS VALVE IAW AMM 21-52-32.  LEAK AND OPS CHECKED GOOD.

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