Md-83 flight crew reported loss of #1 ahrs in cruise flight. They declared an emergency and diverted...

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.

Md-83 flight crew reported loss of #1 ahrs in cruise flight. They declared an emergency and diverted to a nearby suitable airport.