# SDR ALG2002F00033

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 2, 2002
- Submitted: April 16, 2002
- Operation: Air carrier
- Aircraft: [N687AL](https://openairdocs.org/aircraft/N687AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53366
- System (JASC): [6520 · Tail Rotor Gearbox](https://openairdocs.org/jasc/6520)
- Part: Shaft
- Part number: 407040416101
- Part serial: A161
- Condition: Worn
- Location: T/R Gearbox
- Part time: 1,247 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/ALG2002F00033

## Discrepancy

DURING REPAIR FOR LEAKING OUTPUT SEAL, FOUND SPLINES ON OUTPUT SHAFT WORN BELOW LIMITS, READING 1.3025, MIN 1.3035 (SHAFT SPLINES SOFTER METAL THAN TRUNNION SPLINES.)

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