# SDR 97ZZZX534

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 31, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N4191U
- Make and model: Cessna 150D
- Registry model: [Cessna 150D](https://openairdocs.org/model/cessna-150d) (OpenAirDocs)
- Aircraft serial: 15060191
- System (JASC): [3414 · Airspeed/Mach Indicator](https://openairdocs.org/jasc/3414)
- Part: Indicator
- Part number: S1470N8
- Condition: Mismarked
- Location: Air Speed
- Stage of operation: IN
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX534

## Discrepancy

DURING ANNUAL INSP IT WAS FOUND A PIPER AIR SPEED IND WAS INSTALLED AND INCORRECTLY MARKED.  CESSNA AIR SPEED IND LOCATED AND INSTALLED.  FACTORY DATA FOR MARKINGS MATCHED OLDER INST.  TCD SHEET LISTS A DIFFERENT SET OF MARKINGS TO BE DISPLAYED ON INST. UNIT SENT FOR CALIB.

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