# SDR UALA2010040201101

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 2, 2010
- Submitted: April 7, 2010
- Operation: Air carrier
- Aircraft: [N798UA](https://openairdocs.org/aircraft/N798UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26928
- Aircraft time: 53,259 hours, 7,827 cycles
- Engine: Pwa PW4090
- System (JASC): [2161 · Cabin Temperature Controller](https://openairdocs.org/jasc/2161)
- Part: Controller
- Part number: 8102003
- Part serial: 132
- Condition: Faulty
- Location: Cabin Temp
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2010040201101

## Discrepancy

RT ECONOMY COOLING VALVE INOPERATIVE. PACK MODE R DISPLAYED AGAIN AFTER ENGINE START. MSG NR 21-23402.   REPLACED CABIN TEMP CONTROLLER AND INSTALLED SOFTWARE. GRD TESTED, PASSED.

---
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.