Lear 35 crew does not fly assigned heading after takeoff.

Attributes
ACN	452640
Time
Date	199909
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : lga.airport
State Reference	NY
Altitude	agl single value : 2500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	general aviation : personal
Make Model Name	Learjet 35
Flight Phase	climbout : initial
Route In Use	departure : on vectors
Person 1
Affiliation	other
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp pilot : commercial pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 4800 flight time type : 2500
ASRS Report	452640
Person 2
Affiliation	other
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Departing runway 31 and was assigned to turn to heading of 340 degrees, we continued runway heading through at least 2500 ft. Then we called departure on our own -- did not hear tower hand us off. Departure told us to make immediate turn to 040 degrees. We failed to fly departure assigned heading of 340 degrees with radar vectors to follow to our first fix.

Original NASA ASRS Text

Title: LEAR 35 CREW DOES NOT FLY ASSIGNED HDG AFTER TKOF.

Narrative: DEPARTING RWY 31 AND WAS ASSIGNED TO TURN TO HDG OF 340 DEGS, WE CONTINUED RWY HDG THROUGH AT LEAST 2500 FT. THEN WE CALLED DEP ON OUR OWN -- DID NOT HEAR TWR HAND US OFF. DEP TOLD US TO MAKE IMMEDIATE TURN TO 040 DEGS. WE FAILED TO FLY DEP ASSIGNED HDG OF 340 DEGS WITH RADAR VECTORS TO FOLLOW TO OUR FIRST FIX.

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.