A be-400XP crew rejected a takeoff on lga runway 13 because of a compass anomaly but departed VMC on...

Attributes
ACN	1061611
Time
Date	201212
Local Time Of Day	1201-1800
Place
Locale Reference	LGA.Airport
State Reference	NY
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Beechjet 400
Operating Under FAR Part	Part 91
Flight Phase	Takeoff
Flight Plan	IFR
Component
Aircraft Component	AHRS/ND
Person 1
Function	First Officer Pilot Flying
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Clearance Deviation - Track / Heading All Types

Narrative:

Taking off we were subject to the same compass deviations as reported previously in a company newsletter. The compass spun on the takeoff roll and as a result I had to do the math in my head to figure out what heading a 40 degrees to the right would be with our erroneous compass. As a result we missed the next turn by approximately .5 miles. ATC did not query us. Had this event happened in IMC and caused a distraction; so close to nyc; the outcome could have been very different. Do not use runway 13 when deviations of the compass are noted; especially in IMC. I strongly urge that we look at this as a company and its effects on the BE40.

Original NASA ASRS Text

Title: A BE-400XP crew rejected a takeoff on LGA Runway 13 because of a compass anomaly but departed VMC on the second takeoff with a 30 - 40 degree compass error.

Narrative: Taking off we were subject to the same compass deviations as reported previously in a Company newsletter. The compass spun on the takeoff roll and as a result I had to do the math in my head to figure out what heading a 40 degrees to the right would be with our erroneous compass. As a result we missed the next turn by approximately .5 miles. ATC did not query us. Had this event happened in IMC and caused a distraction; so close to NYC; the outcome could have been very different. Do not use Runway 13 when deviations of the compass are noted; especially in IMC. I strongly urge that we look at this as a Company and its effects on the BE40.

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.

A be-400XP crew rejected a takeoff on lga runway 13 because of a compass anomaly but departed VMC on the second takeoff with a 30 - 40 degree compass error.