A CRJ700 ahrs failed in flight for 20-25 minutes then operations returned to normal. After landing m...

Attributes
ACN	974876
Time
Date	201110
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 700 ER/LR (CRJ700)
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	AHRS/ND
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Maintenance

Narrative:

Enroute the first officer's ahrs failed for about 20-25 minutes. It had the red magnetic on PFD1 and on PFD2 the map disappeared and red magnetic flag as well. The first officer's heading slewed about 110 degrees to the right. The first officer was PF and I was pm; we simply selected the FGC to captains side and ran the QRH. Wrote up aircraft once on ground and maintenance simply 'reset system;' ops check good. I refused aircraft based on the fact that the ahrs failed for a long time; we were to fly into a station with thunderstorms at night and felt it was not the safe thing to do. Stop having maintenance just do a reset on a hard failure of a attitude heading reference system or any other system for that fact.

Original NASA ASRS Text

Title: A CRJ700 AHRS failed in flight for 20-25 minutes then operations returned to normal. After landing Maintenance reset the system but the Captain refused the aircraft because the next flight was at night in thunderstorms.

Narrative: Enroute the First Officer's AHRS failed for about 20-25 minutes. It had the red MAG on PFD1 and on PFD2 the map disappeared and red MAG Flag as well. The First Officer's heading slewed about 110 degrees to the right. The First Officer was PF and I was PM; we simply selected the FGC to Captains side and ran the QRH. Wrote up aircraft once on ground and Maintenance simply 'reset system;' ops check good. I refused aircraft based on the fact that the AHRS failed for a long time; we were to fly into a station with Thunderstorms at night and felt it was not the SAFE thing to do. Stop having Maintenance just do a reset on a hard failure of a attitude heading reference system or any other system for that fact.

Data retrieved from NASA's ASRS site as of April 2012 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.

A CRJ700 ahrs failed in flight for 20-25 minutes then operations returned to normal. After landing maintenance reset the system but the captain refused the aircraft because the next flight was at night in thunderstorms.