# SDR 2002F00249

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 25, 2002
- Submitted: March 13, 2002
- Operation: Air carrier
- Aircraft: [N373PA](https://openairdocs.org/aircraft/N373PA), registered now
- Make and model: Boeing 737-3Y0
- Registry model: [Boeing 737-3Y0](https://openairdocs.org/model/boeing-737-3y0) (OpenAirDocs)
- Aircraft serial: 23749
- System (JASC): [2200 · Auto Flight System](https://openairdocs.org/jasc/2200)
- Part: Accessory Unit
- Part number: 65528179
- Condition: Malfunctioned
- Location: Afcs
- Stage of operation: DE
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2002F00249

## Discrepancy

DURING DESCENT AUTOPILOT 'A' DISENGAGED, WITH AIRCRAFT IN TRIM.  UNABLE TO ENGAGE EITHER A OR B AUTOPILOT IN ANY MODE.  REPLACED AUTO-PILOT ACCY UNIT.  OPS CHECK NORMAL.  (M)

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