# SDR 98ZZZX40

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 10, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N9164Z](https://openairdocs.org/aircraft/N9164Z), registered now
- Make and model: Mooney M20M
- Registry model: [Mooney M20M](https://openairdocs.org/model/mooney-m20m) (OpenAirDocs)
- Aircraft serial: 270213
- System (JASC): [2430 · DC Generating System](https://openairdocs.org/jasc/2430)
- Part: Wire
- Condition: Defective
- Location: Battery
- Part time: 321 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/98ZZZX40

## Discrepancy

PILOT REPORTED INTERMITTENT STARTING, VOLTAGE FLUCTUATION, AND LOW BATTERY CHARGE.  INSPECTION FOUND NR 1 AND NR 2 BATTERY GROUND STRAPS AT AIRFRAME ATTACHMENTS TO HAVE HIGH RESISTANCE AT GROUNDING POINT.  CLEANED AREAS AND INSTALLED HARDWARE REFERENCING MOONEY SI M20-97.  SYSTEMS CHECKED OK.  IT APPEARS THE AIRFRAME PRIMER COATING WAS ACTING AS AN INSULATOR.  WHEN REMOVED, THE SYSTEMS OPERATED CORRECTLY.

---
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.