# SDR 21200004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 21, 2004
- Submitted: February 21, 2004
- Operation: General aviation
- Aircraft: [N2084S](https://openairdocs.org/aircraft/N2084S), registered now
- Make and model: Cessna T210L
- Registry model: [Cessna T210L](https://openairdocs.org/model/cessna-t210l) (OpenAirDocs)
- Aircraft serial: 21061050
- Aircraft time: 3,800 hours
- Engine: Cont TSIO520*
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Autopilot Sys
- Part number: 55X
- Condition: Defective
- Location: Cockpit
- Stage of operation: CR
- How discovered: C
- Nature of condition: F
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/21200004

## Discrepancy

AIRCRAFT PORPOISES WHILE IN ALTITUDE HOLD MODE.  DISABLE ALTITUDE HOLD MODE.  MAINTENANCE CONFIRMS DEFECTIVE UNIT BY MANUFACTURER.  MANUFACTURER UNABLE TO SUPPLY REPLACEMENT PART.

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