A cl-300 flight crew reported a track deviation caused by false pfd heading information. The crew re...

Attributes
ACN	955199
Time
Date	201106
Local Time Of Day	0601-1200
Place
Locale Reference	SGR.Airport
State Reference	TX
Environment
Light	Daylight
Aircraft 1
Make Model Name	Challenger 300
Operating Under FAR Part	Part 91
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Compass (HSI/ETC)
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Clearance Deviation - Track / Heading All Types

Narrative:

Upon taxi-out we experienced an amber heading flag on the pfd. We corrected the heading using the magnetic compass and verified upon lining-up on runway 17. After departure we were assigned several heading changes. At one point ATC inquired about our heading. We showed easterly 080 and were told by ATC that in fact we were actually headed south. We looked up at the magnetic compass and saw that our heading was indeed south despite both pilots pfds indicating east. No flags were present on either pfds at this point in the flight. We told ATC that we were experiencing a navigational issue and around the same time they assigned us a 'direct to' clearance. We soon leveled off and were able to get a accurate magnetic compass reading and adjust our pfd headings. The flight continued without incident.

Original NASA ASRS Text

Title: A CL-300 flight crew reported a track deviation caused by false PFD heading information. The crew reported there were no flags associated with the problem.

Narrative: Upon taxi-out we experienced an amber HDG flag on the PFD. We corrected the heading using the magnetic compass and verified upon lining-up on Runway 17. After departure we were assigned several heading changes. At one point ATC inquired about our heading. We showed Easterly 080 and were told by ATC that in fact we were actually headed South. We looked up at the magnetic compass and saw that our heading was indeed South despite both pilots PFDs indicating East. No flags were present on either PFDs at this point in the flight. We told ATC that we were experiencing a navigational issue and around the same time they assigned us a 'direct to' clearance. We soon leveled off and were able to get a accurate magnetic compass reading and adjust our PFD headings. The flight continued without incident.

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 cl-300 flight crew reported a track deviation caused by false pfd heading information. The crew reported there were no flags associated with the problem.