# SDR 2005FA0001537

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 7, 2005
- Submitted: November 21, 2005
- Operation: General aviation
- Aircraft: [N4147K](https://openairdocs.org/aircraft/N4147K), registered now
- Make and model: Piper PA-28-181
- Registry model: [Piper PA-28-181](https://openairdocs.org/model/piper-pa-28-181) (OpenAirDocs)
- Aircraft serial: 2843169
- Engine: Lyc O360A4A
- System (JASC): [8011 · Engine Starter](https://openairdocs.org/jasc/8011)
- Part: Armature
- Part number: MHB2399S
- Condition: Broken
- Location: Starter
- Part time: 40 hours
- Component: Starter, Electrosys
- Component part number: MHB4016
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005FA0001537

## Discrepancy

PILOT REPORTED GRINDING NOISE FROM ENGINE COMPARTMENT WHEN STARTER WAS ENGAGED.  STARTER WAS REMOVED ARMATURE WAS FOUND WITH 2 SPLINES SHEARED OFF.  INTERMEDIATE GEAR WAS MISSING 2 TEETH.  CAUSE UNKNOWN.  THIS IS THE THIRD ARMATURE IN THE PAST 6 MONTHS WITH THE SAME DEFECT.  (K)

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