# SDR QMLA2022110920073

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 8, 2022
- Submitted: November 9, 2022
- Operation: Air carrier
- Aircraft: [N434AM](https://openairdocs.org/aircraft/N434AM), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 54407
- Aircraft time: 4,442 hours
- Engine: Allsn 250C47B
- Engine time: 7,052 hours
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Gearbox
- Condition: Making Metal
- Location: Main Rotor
- Stage of operation: LD
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QMLA2022110920073

## Discrepancy

WHILE IN THE DECELERATION PHASE FOR LANDING, THE "XMSN CHIP" AND MASTER CAUTION LIGHTS ILLUMINATED.  ALL OTHER INDICATIONS - TRANSMISSION PRESSURE, TEMP. WERE NORMAL.  NO ABNORMAL NOISE OR VIBRATIONS NOTED. LANDING AND SHUTDOWN WERE NORMAL. INSPECTED CHIP DETECTORS, SMALL SILVER FLAKES LESS THAN 1 MM FOUND ON MGB SUMP. WHICH IS NORMAL FOR A TRANS WITH LESS THAN 100FH AS PER THE BELL MANUAL. CURRENT TRANSMISSION TIME SINCE OVERHAUL / INSTALLATION IS 78+23FH. RETAINED FLAKES FOR HISTORICAL USE. DRAINED AND RESERVICED, FILTER CHANGE, AND PERFORMED GROUND RUN.

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