# SDR 2017FA0000181

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 9, 2017
- Submitted: May 10, 2017
- Operation: General aviation
- Aircraft: [N64875](https://openairdocs.org/aircraft/N64875), registered now
- Make and model: Cessna 172P
- Registry model: [Cessna 172P](https://openairdocs.org/model/cessna-172p) (OpenAirDocs)
- Aircraft serial: 17275642
- Aircraft time: 19,652 hours
- Engine: Lyc O320D2J
- Engine time: 16,959 hours
- System (JASC): [7420 · Ignition Harness (Distribution)](https://openairdocs.org/jasc/7420)
- Part: Wire Harness
- Part number: M4002
- Condition: Defective
- Location: Engine
- Stage of operation: TO
- How discovered: O
- Nature of condition: R
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2017FA0000181

## Discrepancy

BAD MAG DROP. UNABLE TO BURN OFF. LOSS OF RPM ON TAKEOFF ROLL. DECIDED TO REPLACE IGNITION HARNESS BY PROCESS OF ELIMINATION. REPLACEMENT CORRECTED THE ISSUE.

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