# SDR CA030131003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 30, 2002
- Submitted: March 25, 2003
- Operation: Air carrier
- Make and model: Cessna 172M
- Registry model: [Cessna 172M](https://openairdocs.org/model/cessna-172m) (OpenAirDocs)
- Aircraft time: 5,298 hours
- Engine: Lyc O320E2D
- Propeller: Mcauly 1C160DTM
- System (JASC): [3416 · Altimeter, Barometric/Encoder](https://openairdocs.org/jasc/3416)
- Part: Encoder
- Part number: AR850
- Condition: Failed
- Location: E/E Bay
- Stage of operation: DE
- How discovered: O
- Nature of condition: H
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA030131003

## Discrepancy

(CAN) ATC REPORTED ENCODER READ OUT AT 7,500 FEET, ACTUAL ALTITUDE 3,500 FEET.ENCODER ASSEMBLY REPLACED, NO FURTHER DEFECT.

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