# SDR UALA2009040200946

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 1, 2009
- Submitted: April 8, 2009
- Operation: Air carrier
- Aircraft: N552UA
- Make and model: Boeing 757222
- Aircraft serial: 26641
- Aircraft time: 65,459 hours, 18,814 cycles
- Engine: Pwa PW2037
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Control Valve
- Part number: 3987505
- Part serial: 309
- Condition: Malfunctioned
- Location: Lt A/C Pack
- 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/UALA2009040200946

## Discrepancy

WITH LT PACK IN STANDBY, THE FLT DECK COMPT TEMP REGISTERS 64 DEG & COCKPIT IS COLD.  BITE LT PACK TEMP CONT FAULT LT PACK TEMP CONTROL VALVE, REPLACED VALVE, REPLACED FLIGHT DECK TEMP FILTER, OPS AND LEAK CKS OK.

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