# SDR UALA2010052401770

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 23, 2010
- Submitted: May 26, 2010
- Operation: Air carrier
- Aircraft: [N222UA](https://openairdocs.org/aircraft/N222UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30553
- Aircraft time: 37,082 hours, 4,542 cycles
- Engine: Pwa PW40903
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Controller
- Part number: 11511007
- Part serial: 041C0929
- Condition: Faulty
- Location: Flow Control Val
- Stage of operation: NR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2010052401770

## Discrepancy

LT PACK FLOW CONTROL VALVE (BUT NOT BOTH) OF THE TWO LEFT PACK FLOW CONTROL VALVES ARE NOT IN THE COMMANDED POSITION. STATUS MSG-2124001 LATCHD ER MODE   MSG-2124001 LATCHD ER MODE. FOUND CONTROLLER TO BE FAULTY. REPLACED CABIN PRESSURE CONTROLLER. RESET AND OPS GOOD.

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