# SDR UALA2012020200635

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 2012
- Submitted: February 6, 2012
- Operation: Air carrier
- Aircraft: [N215UA](https://openairdocs.org/aircraft/N215UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30221
- Aircraft time: 41,740 hours, 8,974 cycles
- Engine: Pwa PW4077
- Engine time: 55,089 hours, 10,224 cycles
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Failed
- Location: Nr 1
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012020200635

## Discrepancy

RETURN TO GATE DUE TO NR 1 ENGINE WON'T START IN AUTO AND MANUALLY.  AIR START VALVE MR80102 OFF:43, ON: 1.  DUE TO MIS FOUND ON MASTER CHIP DETECTOR AND MAIN GEARBOX CHIP DETECTOR, REPLACE NR 1 ENGINE ESN 777019.  ENGINE REPLACED.

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