# SDR UALA2012082904854

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 28, 2012
- Submitted: October 17, 2012
- Operation: Air carrier
- Aircraft: N572UA
- Make and model: Boeing 757222
- Aircraft serial: 26682
- Aircraft time: 65,239 hours, 23,912 cycles
- Engine: Pwa PW2037
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Unknown
- Condition: Malfunctioned
- Location: Cockpit Temp
- 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/UALA2012082904854

## Discrepancy

COCKPIT TEMP ALMOST IMPOSSIBLE TO KEEP IN COMFORT RANGE.  EITHER TOO HOT OR TOO COLD.  FLT CREW REPORTS WITH TRIM AIR SYSTEM OFF & PACK SYSTEM IN AUTO PACK IS CONTROLLABLE.  TRIM AIR DEF PROBABLE CAUSE.  BITE OF ZONE TEMP CONTROLLER FOUND NO FAULTS.  RE-ESTABLISHED SYSTEM AND COMPLIED WITH PACK TEMP CONTROL OPS CHECK IAW.  ALL SYSTEMS CHECK NORMAL.

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