# SDR 96ZZZX3911

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 17, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N331SD
- Make and model: Hughes TH-55A
- Registry model: [Hughes TH-55A](https://openairdocs.org/model/hughes-th-55a) (OpenAirDocs)
- Aircraft serial: 291105
- Engine: Lyc HIO360B1A
- System (JASC): [7414 · Magneto/Distributor](https://openairdocs.org/jasc/7414)
- Part: Oil Seal
- Part number: 10357592
- Condition: Failed
- Location: Mag Drive End
- Component: S4LN200
- Stage of operation: NR
- Nature of condition: E, R
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96ZZZX3911

## Discrepancy

DURING TRAINING FLIGHT, ENGINE ROUGHNESS 'FELT' IN-FLIGHT; FOUND MAGNETO POINTS SATURATED WITH OIL.  REPLACED MAGNETO WITH REBUILT UNIT.

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