# SDR 9JLA2022071923497

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 11, 2022
- Submitted: July 19, 2022
- Operation: Air carrier
- Aircraft: N827JN
- Make and model: Cessna 560XL
- Registry model: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (OpenAirDocs)
- Aircraft serial: 5605223
- Aircraft time: 3,289 hours, 2,583 cycles
- System (JASC): [3420 · Attitude and Direction Data System](https://openairdocs.org/jasc/3420)
- Part: Ahrs
- Part number: 1421851100
- Part serial: 2344
- Condition: Failed
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9JLA2022071923497

## Discrepancy

THE FLIGHT CREW REPORTED THAT THE HEADING AND ATTITUDE ON PDF2 FAILED ON CLIMB OUT FROM AIRPORT. SELECTED HDG&ATT REV. AUTOPILOT WOULD NOT ENGAGE DUE TO LACK OF AHRS INPUT. THE BASE MAINTENANCE TEAM TROUBLESHOT AND FOUND THE NO2 AHRS HAD FAILED. IT WAS REMOVED AND REPLACED WITH A SERVICEABLE UNIT. OPS CHECKS WERE SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE.

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