Heading track deviation on departure vectors.

Attributes
ACN	244119
Time
Date	199306
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lga
State Reference	NY
Altitude	msl bound lower : 6000 msl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90 artcc : zla
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 180 flight time total : 10000 flight time type : 5000
ASRS Report	244119
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 150 flight time total : 11500 flight time type : 2000
ASRS Report	244043
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	flight crew : overcame equipment problem flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Takeoff accomplished on runway 13 with whitestone climb accomplished. Departure had given several vectors when they asked us about our heading. At this time we were indicating 300 degrees but departure showed us steering 270 degrees. Both compass system were indicating the same heading. Since both system indicated the same thing, no instrument comparator light was ever given as a warning. Both system were reslaved and appeared to maintain heading at this point. Checked with company concerning possible magnetic cargo but none known of. Checked with flight attendants in reference to electronic devices but none were in use at this time.

Original NASA ASRS Text

Title: HDG TRACK DEV ON DEP VECTORS.

Narrative: TKOF ACCOMPLISHED ON RWY 13 WITH WHITESTONE CLB ACCOMPLISHED. DEP HAD GIVEN SEVERAL VECTORS WHEN THEY ASKED US ABOUT OUR HDG. AT THIS TIME WE WERE INDICATING 300 DEGS BUT DEP SHOWED US STEERING 270 DEGS. BOTH COMPASS SYS WERE INDICATING THE SAME HDG. SINCE BOTH SYS INDICATED THE SAME THING, NO INST COMPARATOR LIGHT WAS EVER GIVEN AS A WARNING. BOTH SYS WERE RESLAVED AND APPEARED TO MAINTAIN HDG AT THIS POINT. CHKED WITH COMPANY CONCERNING POSSIBLE MAGNETIC CARGO BUT NONE KNOWN OF. CHKED WITH FLT ATTENDANTS IN REF TO ELECTRONIC DEVICES BUT NONE WERE IN USE AT THIS TIME.

Data retrieved from NASA's ASRS site as of July 2007 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.