# SDR 98ZZZX2651

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 30, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N96CF](https://openairdocs.org/aircraft/N96CF), registered now
- Make and model: Diamon DA20-A1
- Registry model: [Diamon DA20-A1](https://openairdocs.org/model/diamond-aircraft-ind-da20-a1) (OpenAirDocs)
- Aircraft serial: 10157
- System (JASC): [3120 · Independent Instruments](https://openairdocs.org/jasc/3120)
- Part: Tachometer
- Part number: D11125240
- Condition: Failed
- Location: Hourmeter
- Part time: 1,010 hours
- 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/98ZZZX2651

## Discrepancy

HOUR METER ON TACHOMETER STOPPED RECORDING.  OPENED TACHOMETER AND FOUND THE MAIN DRIVE GEAR CAME LOOSE ON THE SHAFT.  THIS IS THE 4TH OCCURRENCE OF THIS PROBLEM ON THE EXACT MODEL TACHOMETER.  MFG NEEDS TO ATTACH DRIVE GEAR MORE PERMANENTLY TO THE SHAFT.  TACHOMETER RPM INDICATOR STILL CONTINUES TO OPERATE 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.