# SDR 20000714SH011

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 13, 1998
- Submitted: July 14, 2000
- Operation: General aviation
- Aircraft: [N6135J](https://openairdocs.org/aircraft/N6135J), registered now
- Make and model: Piper PA-28-181
- Registry model: [Piper PA-28-181](https://openairdocs.org/model/piper-pa-28-181) (OpenAirDocs)
- Aircraft serial: 287690350
- System (JASC): [7714 · Engine RPM Indicating System](https://openairdocs.org/jasc/7714)
- Part: Tachometer
- Condition: Inaccurate
- Location: Instrument Panel
- Part time: 6,038 hours
- Stage of operation: NR
- How discovered: C
- Nature of condition: R
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/20000714SH011

## Discrepancy

PILOT COMPLAINED THAT ENGINE WAS NOT MAKING ENOUGH RPM.  CHECKED TACHOMETER WITH PHOTO TACHOMETER AND FOUND A/C TOOL TO BE 120 RPM - 140 RPM LOW THROUGHOUT FULL RANGE OF OPERATION.  UNIT WAS ORIGINAL TO AIRCRAFT.  INSTALLED REPLACEMENT TACH - MITCHELL, P/N DA-112-503.   (X)

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