# SDR UALA2013010700072

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 4, 2013
- Submitted: January 18, 2013
- Operation: Air carrier
- Aircraft: [N795UA](https://openairdocs.org/aircraft/N795UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26927
- Aircraft time: 67,014 hours, 9,574 cycles
- Engine: Pwa PW40903
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Bypass Valve
- Part number: 8102142
- Part serial: 18
- Condition: Faulted
- Location: Nr 2 A/C Pack
- Stage of operation: TX
- 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/UALA2013010700072

## Discrepancy

"COND TEMP SENSOR R" STATUS MESSAGE DISPLAYED DURING AIRCRAFT TOW FROM HANGAR TO GATE.  RESET PACK CONTROLLER AND CABIN TEMP CONTROLLER, FAULT CLEARED, OP CHECKED GOOD.  REPLACED SECOND STAGE TURBINE BYPASS VALVE (RT PACK) IAW FIM 21-52 TASK 834 AND AMM 21-52-32.  MAINT MESSAGE 21-23502.  GROUND TESTED OK AND OPS TESTED OK.

---
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.