# SDR EVCA20150930

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 23, 2015
- Submitted: October 1, 2015
- Operation: Air carrier
- Aircraft: [N499AE](https://openairdocs.org/aircraft/N499AE), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53367
- Aircraft time: 6,432 hours, 20,433 cycles
- Engine: Allsn 250C47B
- System (JASC): [6520 · Tail Rotor Gearbox](https://openairdocs.org/jasc/6520)
- Part: Gearbox
- Part number: 406040400121FM
- Part serial: A1160
- Condition: Unserviceable
- Location: Tail Rotor
- Part time: 7,224 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/EVCA20150930

## Discrepancy

WHEN PERFORMING OIL CHANGE OF TAIL ROTOR GEARBOX, FOUND OIL REMAINING IN GEARBOX TO ONLY MEASURE APPROX 1 OZ.  FLUID LOSS APPEARED TO ORIGINATE FROM TAIL ROTOR PITCH CHANGE CONTROL ROD SEAL.

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