# SDR QMLA2011120111115

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 1, 2011
- Submitted: December 6, 2011
- Operation: Air carrier
- Aircraft: [N404LL](https://openairdocs.org/aircraft/N404LL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53446
- Aircraft time: 6,085 hours, 17,148 cycles
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Transmission
- Part number: 407040006107
- Part serial: A323
- Condition: Making Metal
- Location: Main Rotor
- Part time: 2,967 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QMLA2011120111115

## Discrepancy

THE MECHANIC FOUND DURING A ROUTINE INSPECTION,  A LARGE AMOUNT OF METAL ON THE TRANSMISSION CHIP DETECTOR.  THE ACFT WAS PULLED FROM SERVICE.   THERE HAVE BEEN MULTIPLE CHIP EVENTS FOR THIS TRANSMISSION LEADING UP TO THIS CURRENT EVENT.  THIS ACFT IS CURRENTLY OUT OF SERVICE AWAITING A TRANSMISSION REPLACEMENT.

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