# SDR 2026FA0000063

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 23, 2026
- Submitted: January 28, 2026
- Operation: General aviation
- Aircraft: [N420KV](https://openairdocs.org/aircraft/N420KV), registered now
- Make and model: Lear 60LEAR
- Aircraft serial: 60197
- Aircraft time: 8,713 hours, 5,285 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Servo
- Part serial: 46YY
- Condition: Weak
- Location: Zone 200
- Stage of operation: CL
- How discovered: O
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000063

## Discrepancy

ON 1/23/2026 N420KV CYO420 WAS DEPARTING KORL AND WHILE THE AIRCRAFT WAS CLIMBING WITH THE AUTOPILOT ENGAGED, THE CAPTAIN REPORTED THE PITCH CONTROL WAS UNSTABLE. THE CONTROL COLUMN WAS MOVING BACK AND FORTH AND WOULD STOP WHEN AUTOPILOT WAS DISENGAGED. THE TRIP CONTINUED AT A LOWER ALTITUDE WITH AP DISENGAGED AND LANDED SAFELY AT KJAX. LOCAL MAINTENANCE WAS CALLED TO TROUBLE SHOOT THE AUTO PILOT PITCH SYSTEM. IT WAS DETERMINED THAT THE PITCH SERVO WAS THE ISSUE. THE SERVO WAS REPLACED AND A GROUND TEST COMPLETED - NO DISCREPANCIES NOTED. ALL AUTOPILOT SYSTEM FUNCTIONS WERE NORMAL. A REPOSITION/TEST FLIGHT WAS COMPLETED WITH ALL AUTOPILOT FUNCTIONS REPORTED TO BE NORMAL.

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