# SDR LF1RN20PT030422

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 4, 2022
- Submitted: March 15, 2022
- Operation: General aviation
- Aircraft: [N20PT](https://openairdocs.org/aircraft/N20PT), registered now
- Make and model: Piper PA 46-350P
- Registry model: [Piper PA 46-350P](https://openairdocs.org/model/piper-pa-46-350p) (OpenAirDocs)
- Aircraft serial: 4636771
- Aircraft time: 300 hours
- System (JASC): [7400 · Ignition System](https://openairdocs.org/jasc/7400)
- Part: None
- Part number: M3611
- Condition: Worn
- Location: Zone 400
- Part time: 300 hours
- Component: Magneto, Slick
- Stage of operation: TX
- How discovered: C
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/LF1RN20PT030422

## Discrepancy

OWNER REPORTED THE MAG DROP ON THE LEFT MAGNETO WAS EXCESSIVE. PERFORMED A GROUND RUN AND CONFIRMED THE RPM DROP WAS OVER 150 RPM. CHECKED MAGNETO TO ENGINE TIMING AND FOUND TO BE RETARDED BY 6 DEGREES. REMOVED THE LH MAGNETO, DISASSEMBLED AND INSPECTED. FOUND THE MAGNETO CAM WORN EXCESSIVELY. THE MAGNETO TIMING WAS CHECKED 100 HOURS PREVIOUS WITH NO DISCREPANCY NOTED. SLICK SB 1-12 DOES NOT APPLY TO THIS UNIT. REPLACED MAGNETO CAM WITH NEW UNIT P/N M3611 AND REINSTALLED MAG ON ENGINE. WE FEEL THAT THE WEAR EXHIBITED ON THE POINTS IS EXCESSIVE GIVEN THE TIME ON THE ENGINE/MAGNETO.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.