# SDR 9WGA2021091154601

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 11, 2021
- Submitted: September 13, 2021
- Operation: Air carrier
- Aircraft: [N546JN](https://openairdocs.org/aircraft/N546JN), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48546
- Aircraft time: 81,747 hours, 14,748 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Autopilot Sys
- Condition: Failed
- Stage of operation: CL
- How discovered: O
- Nature of condition: G
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9WGA2021091154601

## Discrepancy

ON INITIAL CLIMB OUT, SIMULTANEOUS FAILURE 3 SYSTEMS - RADAR ALTIMETER (ERRONEOUS), AUTO PILOT 1 & 2 FAIL, AUTO THROTTLE.

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