# SDR ABXA030128

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 1, 2003
- Submitted: April 10, 2003
- Operation: Air carrier
- Aircraft: [N828AX](https://openairdocs.org/aircraft/N828AX), registered now
- Make and model: Doug DC-8-63F
- Registry model: [Doug DC-8-63F](https://openairdocs.org/model/mcdonnell-douglas-dc-8-63f) (OpenAirDocs)
- Aircraft serial: 45999
- Aircraft time: 79,173 hours, 25,766 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Servo Valve
- Part number: 75130
- Part serial: 33260A
- Condition: Malfunctioned
- Location: Autopilot
- 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/ABXA030128

## Discrepancy

UNCOMMANDED YAW IN FLIGHT.  AUTOPILOT ON.  REPLACED RUDDER POWER PACK TRANSFER VALVE IAW DC-8 MM 27-21-6.

---
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.