# SDR UALA2012081004343

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 8, 2012
- Submitted: September 14, 2012
- Operation: Air carrier
- Aircraft: [N227UA](https://openairdocs.org/aircraft/N227UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30555
- Aircraft time: 44,107 hours, 5,349 cycles
- Engine: Pwa PW40903
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Valve
- Part number: 8102212
- Condition: Faulty
- Stage of operation: IN
- How discovered: V
- Nature of condition: P
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012081004343

## Discrepancy

ZONE C TEMP CONTROL TARGET TEMP BLANK AT C ACCOMPLISHED AND ZONE C TRIM AIR VALVE FAILED ON GROUND TEST PRIOR  SUSPECT ZONE TRIM MODULATING VALVE.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.