# SDR QMLA2013021313026

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 13, 2013
- Submitted: February 19, 2013
- Operation: Air carrier
- Aircraft: [N911TG](https://openairdocs.org/aircraft/N911TG), registered now
- Make and model: Bolkms BK117C1
- Aircraft serial: 7506
- Aircraft time: 8,482 hours, 32,979 cycles
- System (JASC): [6520 · Tail Rotor Gearbox](https://openairdocs.org/jasc/6520)
- Part: Gearbox
- Part number: 4639003007
- Part serial: 369
- Condition: Making Metal
- Location: Tail Rotor
- Part time: 9,010 hours
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QMLA2013021313026

## Discrepancy

TAIL ROTOR GEARBOX CHIP LIGHT OCCURED DURING ENGINE SHUTDOWN.  A VISUAL INSPECTION FOUND A CHIP OUT OF LIMITS.   REMOVED FAILED GEARBOX. GEARBOX AND SHAFT ASSY, ASSEMBLED AND INSTALLED ON ACFT, PERFORMED VIBRATION & BALANCE CHECK AND RETURNED ACFT TO SERVICE.

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