# SDR UALA2009120403751

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 3, 2009
- Submitted: December 4, 2009
- Operation: Air carrier
- Aircraft: [N769UA](https://openairdocs.org/aircraft/N769UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26921
- Aircraft time: 57,820 hours, 10,732 cycles
- Engine: Pwa PW4077
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Making Metal
- Location: Nr 1
- Stage of operation: IN
- 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/UALA2009120403751

## Discrepancy

EXCESSIVE METAL PARTICLES FOUND ON NR 1 ENG MASTER CHIP DETECTOR AND MAIN GEARBOX CHIP DETECTOR.   NR 1 ENG NO ROTATION. DUE TO REPORT OF ENGINE NOT CRANKING AT START ALONG WITH PMA-N2 MSG AS REPORTED BY SFOEP, MX FOUND EXCESSIVE METAL PARTICLES ON NR1 ENG MASTER CHIP DETECTOR & MAIN GEARBOX CHIP DETECTORS. POSSIBLE GEAR BOX "MB7" BRG FAILURE. REQUIRES LT ENG CHANGE. ENG REPLACED BY ESN 777029.

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