A CE560-xl flight crew momentarily lost all heading and nav data with the exception of heading infor...

Attributes
ACN	970279
Time
Date	201109
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Citation Excel (C560XL)
Operating Under FAR Part	Part 135
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	AHRS/ND
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

While en route we experienced a dual heading failure on the #1 pfd HSI and the #2 pfd HSI. We had red heading fail annunciators on the both pfd's; the mfd; and the standby HSI. With this we also lost navigation information on the mfd. We ran the emergency checklist for dual heading failure; notified ATC of our status; and asked for vectors for the remainder of the flight.after approximately three minutes; the #1 pfd HSI came back. Approximately two minutes later the #3 pfd HSI started working. We chose not to continue the RNAV arrival into our destination but completed the flight with no other abnormalities.

Original NASA ASRS Text

Title: A CE560-XL flight crew momentarily lost all heading and nav data with the exception of heading information on the SAI's heading tape. After several minutes the navigation equipment returned to normal and the flight was completed with the flight crew opting not to utilize RNAV guidance.

Narrative: While en route we experienced a dual heading failure on the #1 PFD HSI and the #2 PFD HSI. We had red heading fail annunciators on the both PFD's; the MFD; and the standby HSI. With this we also lost navigation information on the MFD. We ran the emergency checklist for dual heading failure; notified ATC of our status; and asked for vectors for the remainder of the flight.After approximately three minutes; the #1 PFD HSI came back. Approximately two minutes later the #3 PFD HSI started working. We chose not to continue the RNAV arrival into our destination but completed the flight with no other abnormalities.

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 CE560-xl flight crew momentarily lost all heading and nav data with the exception of heading information on the sai's heading tape. After several minutes the navigation equipment returned to normal and the flight was completed with the flight crew opting not to utilize RNAV guidance.