# SDR 2002F00247

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 27, 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: Defective
- Location: Afcs
- Stage of operation: TO
- How discovered: O
- Nature of condition: F
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2002F00247

## Discrepancy

ATL - UNABLE TO ENGAGE EITHER A/B AUTO PILOT SYSTEM IN ANY MODE.  REMOVED AND REPLACED AUTO PILOT ACCESSORY UNIT.  PERFORMED AFDS TEST BY CDU PER MM 22-11-01.  (M)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.