# SDR 2022F00162

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 22, 2022
- Submitted: March 24, 2022
- Operation: General aviation
- Aircraft: N785TW
- Make and model: Doug DC-9-15F
- Registry model: [Doug DC-9-15F](https://openairdocs.org/model/mcdonnell-douglas-dc-9-15f) (OpenAirDocs)
- Aircraft serial: 47015
- Aircraft time: 55,345 hours, 61,903 cycles
- Engine: Pwa JT8D
- Engine time: 60,513 hours, 70,105 cycles
- System (JASC): [2211 · Autopilot Computer](https://openairdocs.org/jasc/2211)
- Part: None
- Part number: 258782621
- Part serial: 0680748
- Condition: Faulty
- Location: Zone 100
- Part time: 55,345 hours, 61,903 cycles
- 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/2022F00162

## Discrepancy

ON CLIMB OUT KDRT, AIRCRAFT BEGAN ALTERNATING LEFT/RIGHT YAW EVENTS WHICH CONTINUED THROUGHOUT FLIGHT WITH AUTOPILOT ON OR OFF.  UNSCHEDULED LANDING KSAT.  CORRECTIVE ACTION REMOVED AND REPLACED STAB AUG. COMPUTER AND PERFORMED OPS CHECK IAW DC9 AMM 22-11-1.  OPS CHECK GOOD.

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