# SDR 2000ZZZX267

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 22, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N600DT](https://openairdocs.org/aircraft/N600DT), registered now
- Make and model: Lear 35LEAR
- Aircraft serial: 35017
- System (JASC): [2211 · Autopilot Computer](https://openairdocs.org/jasc/2211)
- Part: Computer
- Part number: 501113202
- Condition: Failed
- Location: Cockpit
- Stage of operation: NR
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2000ZZZX267

## Discrepancy

MACH TRIM FAILED IN-FLIGHT, AIRCRAFT WOULD NOT DESCEND USING PRIMARY TRIM.  CREW HAD TO USE SECONDARY TRIM TO RETURN TO DEPARTURE AIRPORT.  AFTER COMPLETING CHECKLIST, CREW WENT BACK TO PRIMARY TRIM.

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