# SDR USAA2012022000023

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 19, 2012
- Submitted: February 20, 2012
- Operation: Air carrier
- Aircraft: [N195UW](https://openairdocs.org/aircraft/N195UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 3633
- Aircraft time: 11,237 hours, 4,285 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Adiru
- Condition: Faulted
- 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/USAA2012022000023

## Discrepancy

IN AUTOPILOT ONE, AIRCRAFT STARTED AN UNCOMMANDED CLIMB AT CRUISE.  AUTOPILOT 2 WAS OK.  POST FLIGHT REPORT SHOWED ADIRU1 FAULTED.  BITE TEST AND GROUND SCAN OF ADIRU 1 CHECKED GOOD IAW AIRBUS MAINTENANCE MANUAL 34-13-00.  PERFORMED AUTOMATIC FLIGHT SYSTEM TEST WITH NO FAULTS NOTED IAW MM 22-96-00.

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