# SDR GTIA020640

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 9, 2002
- Submitted: July 9, 2002
- Operation: Air carrier
- Aircraft: N801NK
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 48048
- System (JASC): [2215 · Autopilot Main Servo](https://openairdocs.org/jasc/2215)
- Part: Servo
- Part number: 4034237915
- Part serial: 88062126
- Condition: Faulty
- Location: Autopilot Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/GTIA020640

## Discrepancy

TPA - FLT 632 - AUTO PILOT IS VERY SLOW TO TRIM DURING LEVEL OFFS AND WITH SPEED CHANGE.  AUTO PILOT TRIM COMPARATOR LIGHT ILLUMINATES AND A/P WON'T ALWAYS CAPTURE ALTITUDE.  BOTH DFGS 1 AND 2 DO THE SAME.  REMOVED AND REPLACED DUPLEX ELEVATOR SERVO DRIVE WITH SERVICEABLE UNIT.  RAN RIGHTS CHECK ON NR 1 AND NR 2 SYSTEMS, BOTH SIDES GO.  (M)

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