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Md-83 flight crew reported loss of #1 ahrs in cruise flight. They declared an emergency and diverted to a nearby suitable airport.
| Attributes | |
| ACN | 1048700 |
| Time | |
| Date | 201211 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Make Model Name | MD-83 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | AHRS/ND |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
I was the pilot flying during level cruise flight approximately 60 miles north of ZZZ. Captain's pfd attitude indications and navigation display/heading information failed concurrently. We were approaching a line of weather and I elected not to continue IMC with a failed ahrs system. I declared an emergency requested a turn for ZZZ and we began a descent to maintain VMC. The QRH was referenced and complied with - the landing was uneventful. My decision to divert was reinforced; as I was concerned for the integrity of the remaining ahrs system. This decision was made based on the fact that on the previous leg (same aircraft) inbound to [destination] we had the first officer's #2 ahrs fail and after a 6 hour delay it was replaced prior to [departure].
Original NASA ASRS Text
Title: MD-83 flight crew reported loss of #1 AHRS in cruise flight. They declared an emergency and diverted to a nearby suitable airport.
Narrative: I was the pilot flying during level cruise flight approximately 60 miles north of ZZZ. Captain's PFD attitude indications and NAV display/HDG information failed concurrently. We were approaching a line of weather and I elected not to continue IMC with a failed AHRS system. I declared an emergency requested a turn for ZZZ and we began a descent to maintain VMC. The QRH was referenced and complied with - the landing was uneventful. My decision to divert was reinforced; as I was concerned for the integrity of the remaining AHRS system. This decision was made based on the fact that on the previous leg (same aircraft) inbound to [destination] we had the First Officer's #2 AHRS fail and after a 6 hour delay it was replaced prior to [departure].
Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.