# SDR 9JLA20110630001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 30, 2011
- Submitted: August 30, 2011
- Operation: Air carrier
- Aircraft: N726CL
- Make and model: Cessna 525
- Registry model: [Cessna 525](https://openairdocs.org/model/cessna-525) (OpenAirDocs)
- Aircraft serial: 420
- Aircraft time: 2,362 hours, 2,715 cycles
- System (JASC): [3425 · Integrated Flight System](https://openairdocs.org/jasc/3425)
- Part: Ahrs
- Part number: 8221110001
- Part serial: 49YM
- 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/9JLA20110630001

## Discrepancy

CREW REPORTED THE NR 1 AHRS FAILED DURING THE THIRD LEG OF TRIP AND HAD TO SWITCH TO REVERSIONARY AHRS NR 2.  TROUBLESHOOTING FOUND THE AHRS COMPUTER DEFECTIVE P/N 822-1110-001 S/N 49YM.

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