# SDR CA990219002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 29, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Piper PA-31-350
- Registry model: [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350) (OpenAirDocs)
- Engine: Lyc TIO540J2BD
- System (JASC): [7714 · Engine RPM Indicating System](https://openairdocs.org/jasc/7714)
- Part: Indicator
- Part number: 574AW
- Condition: Failed
- Location: Dual Tach
- Part time: 4,927 hours
- Stage of operation: NR
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA990219002

## Discrepancy

(CAN) LEFT TACH INDICATION FAILURE IN-FLIGHT.  TACH DRIVE SPRING FAILED POSSIBLY BECAUSE IT HAD NOT BEEN LUBED PROPERLY AT ANGLE DRIVE ADAPTER.

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