# SDR 9JLA2014021703590

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 14, 2014
- Submitted: February 17, 2014
- Operation: Air carrier
- Aircraft: [N560HN](https://openairdocs.org/aircraft/N560HN), registered now
- Make and model: Cessna 560XL
- Registry model: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (OpenAirDocs)
- Aircraft serial: 5605015
- Aircraft time: 2,929 hours, 2,339 cycles
- System (JASC): [3425 · Integrated Flight System](https://openairdocs.org/jasc/3425)
- Part: Ahrs
- Part number: 1421851100
- Part serial: 1135
- Condition: Defective
- Location: Nr 1
- Stage of operation: CR
- 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/9JLA2014021703590

## Discrepancy

CREW REPORTED THAT IN FLIGHT AT FL270 THEY RECEIVED A ATT & HDG FAIL ON PILOTS PDF & FMS HAD AHRS 1 INPUT FAIL, AHRS HDG FAIL MASSAGES.  TROUBLESHOOTING FOUND THE NR 1 AHRS DEFECTIVE, THE DEFECTIVE UNIT PN 142185-1100 SN 1135 WAS REMOVED & A REPAIRED UNIT WAS INSTALLED.

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