# SDR 96ZZZX1943

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 18, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N781TC](https://openairdocs.org/aircraft/N781TC), registered now
- Make and model: Cessna 421C
- Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Aircraft serial: 421C0083
- System (JASC): [7714 · Engine RPM Indicating System](https://openairdocs.org/jasc/7714)
- Part: Tach Generator
- Part number: A6532
- Condition: Brush Wear
- Location: Engine
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96ZZZX1943

## Discrepancy

TACHOMETER GENERATOR INTERNAL GEARS ARE WEARING PREMATURELY CAUSING BRUSHES TO FAIL.  NEW REPLACEMENT PART FROM SHELF AVERAGED LESS THAN 100 HOURS TIS, BEFORE FAILURE.

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