# SDR UALA2011013100512

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 31, 2011
- Submitted: January 31, 2011
- Operation: Air carrier
- Aircraft: [N653UA](https://openairdocs.org/aircraft/N653UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 25391
- Aircraft time: 79,102 hours, 12,792 cycles
- Engine: Pwa PW4060
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3964622
- Part serial: 22
- Condition: Faulty
- Location: Lt A/C Pack
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011013100512

## Discrepancy

LEFT PACK DURING PACK OFF ENG START DID NOT SHOW OFF ON SWITCH OR EICAS.   ATTEMPTED SEVERAL RESETS AND C/B CYCLING, NO HELP.  MEL REQUIRES EICAS TO DISPLAY.  REPLACED LT FLOW CONTROL VALVE IAW MM, OPS CKS OK.

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