# SDR 9JLA20111093441

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 7, 2011
- Submitted: October 21, 2011
- Operation: Air carrier
- Aircraft: N309BT
- Make and model: Cessna 560XL
- Registry model: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (OpenAirDocs)
- Aircraft serial: 5605067
- Aircraft time: 4,223 hours, 3,115 cycles
- System (JASC): [3425 · Integrated Flight System](https://openairdocs.org/jasc/3425)
- Part: Ahrs
- Part number: 1421851100
- Part serial: 1113
- Condition: Failed
- Location: Nr 2
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9JLA20111093441

## Discrepancy

THE CREW REPORTED THAT THE NR 2 AHRS WOULD NOT COME ON LINE (ATT AND HEADING FAIL).  TROUBLESHOT AND FOUND THAT THE AHRS UNIT S/N 1113 FAILED.  INSTALLED A REPAIRED AHRS UNIT.  FUNCTIONAL CHECKS SATISFACTORY.  NOTE:  AHRS UNIT S/N 1113 FAILED 2.9 HRS AFTER INSTALLATION.  THE 8130-3 INDICATED THAT UNIT WAS INSPECTED ON AUG 11, 2011.

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