# SDR COEA2016031701804

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 17, 2016
- Submitted: March 18, 2016
- Operation: Air carrier
- Aircraft: N804HC
- Make and model: Aerosp ATR42-500
- Registry model: [Aerosp ATR42-500](https://openairdocs.org/model/aerospatiale-alenia-atr42-500) (OpenAirDocs)
- Aircraft serial: 623
- Aircraft time: 19,822 hours, 22,103 cycles
- System (JASC): [3425 · Integrated Flight System](https://openairdocs.org/jasc/3425)
- Part: Ahrs
- Part number: 7003360946
- Part serial: 94052919
- Condition: Faulty
- Location: Cockpit
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/COEA2016031701804

## Discrepancy

FLIGHT 614, AIR TURN BACK & DISCREPANCY.  EFIS COMPARTMENT, FIRST OFFICERS SIDE, HEADING SPLIT, 10 DEGREES OFF IN FLIGHT.  CREW RETURNED ACFT, NO EMER DECLARED.  REPLACED THE AHRU.  OPERATIONS CHECKED GOOD.

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