# SDR 2026FA0000810

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 15, 2026
- Submitted: October 5, 2026
- Operation: General aviation
- Aircraft: [N9140X](https://openairdocs.org/aircraft/N9140X), registered now
- Make and model: Mooney M20J
- Registry model: [Mooney M20J](https://openairdocs.org/model/mooney-m20j) (OpenAirDocs)
- Aircraft serial: 243245
- Engine: Lyc IO360A3B6D
- System (JASC): [7411 · Low Tension Coil](https://openairdocs.org/jasc/7411)
- Part: Coil
- Part number: EA2000
- Part serial: 23439006
- Condition: Damaged
- Location: Nr 4 Cylinder
- Part time: 11 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000810

## Discrepancy

ENGINE CYLINDER NR 4 WAS EXPERIENCING INTERMITTENT MISFIRING. FOUND LT COIL WAS GROUNDING TO ITS MOUNT THROUGH A SMALL PINHOLE IN BOTTOM OF THE COIL CASE,  ELECTROAIR STATED THAT IT WAS TESTED AND "THERE WAS NOTHING WRONG WITH IT". THE COIL WAS RETURNED AND A NEW COIL WAS INSTALLED, WHICH SOLVED THE MISFIRE CONDITION. WE CONNECTED A HIGH TENSION CABLE TESTER TO THE SUSPECT COIL AND OBSERVED HIGH VOLTAGE SPARKING EMANATING FROM THE PINHOLE AS DESCRIBED ABOVE.  MY CONCERN IS THIS COIL WAS DETERMINED TO BE AIRWORTHY AND THE OWNER COULD HAVE SOLD IT IN THE USED MARKET.

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