# SDR 2020FA0000347

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 4, 2020
- Submitted: July 27, 2020
- Operation: General aviation
- Aircraft: N3477
- Make and model: Piper PA-28-181
- Registry model: [Piper PA-28-181](https://openairdocs.org/model/piper-pa-28-181) (OpenAirDocs)
- Aircraft serial: 287890305
- Aircraft time: 3,540 hours, 3,540 cycles
- Engine: Lyc O360A4M
- Engine time: 720 hours, 720 cycles
- System (JASC): [7414 · Magneto/Distributor](https://openairdocs.org/jasc/7414)
- Part: Magneto
- Part number: 4371
- Part serial: 17090965
- Condition: Malfunctioned
- Location: Engine
- Part time: 720 hours, 720 cycles
- Stage of operation: CR
- How discovered: C
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2020FA0000347

## Discrepancy

DURING CRUISE FLIGHT ENGINE RPM DECAYED 100 TO 200 RPM.  UNSCHEDULED LANDING ACCOMPLISHED.  GROUND CHECK REVEALED LEFT MAGNETO FAILURE.

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