# SDR CA141215003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 12, 2014
- Submitted: March 12, 2015
- Operation: General aviation
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft time: 3,128 hours
- Engine: Lyc IO360L2A
- System (JASC): [7414 · Magneto/Distributor](https://openairdocs.org/jasc/7414)
- Part: Impulse Coupling
- Condition: Out Of Tolerance
- Location: Magneto
- Part time: 470 hours
- Component: Magneto, Champion
- Component part number: 4371
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA141215003

## Discrepancy

(CAN) ENGINE WAS HARD TO START WHEN HOT. FOUND IMPULSE COUPLING FIRING OFF 9-10 DEGREES AFTER TDC WHEN IT SHOULD BE CLOSER TO TDC. DIDN`T MAKE IT TO THE INITIAL 500 HOUR INSPECTION BEFORE INTERNAL MAGNETO TIMING REQUIRES ADJUSTMENT.

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