# SDR UALA2009082402625

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 24, 2009
- Submitted: August 24, 2009
- Operation: Air carrier
- Aircraft: N598UA
- Make and model: Boeing 757222
- Aircraft serial: 28751
- Aircraft time: 42,155 hours, 11,712 cycles
- Engine: Pwa PW2037
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3987505
- Part serial: 285
- Condition: Faulty
- Location: Rt Ac Pack
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2009082402625

## Discrepancy

BITE ON RT PACK CONTROLLER SHOWS PACK TEMP CONTROL VALVE, RTFL.  REPLACED PACK TEMP CONTROL VALVE.   WITH BOTH PACKS RUNNING RT PACK FLOW CONTROL VLV VISUAL INDICATOR SHOWS VLV 3-4 OPEN AND LEFT FCV INDICATOR SHOWS FULL OPEN.  REPLACED RT FLOW CONTROL VALVE.  REPLACED RIGHT PACK LOW LIMIT VALVE AND LEAK CHECK.  OP CHECK NORMAL (P/N 3289696-1 - S/N 85).  REPLACED RIGHT PACK ACM.

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