S80 turns to wrong assigned heading departing lga.

Attributes
ACN	456120
Time
Date	199911
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lga.airport
State Reference	NY
Altitude	msl single value : 1500
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude climbout : initial
Route In Use	departure : other published ifr departure
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	456120
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Events
Anomaly	non adherence : clearance non adherence : far other spatial deviation
Independent Detector	atc equipment other atc equipment : radar other controllera
Resolutory Action	controller : issued advisory controller : issued new clearance
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

N90 approach gave us what we thought was a 040 degree heading and we read it back that way. 3 mins later they asked what heading were we flying, I said 040 degrees assigned, and they said we were assigned 340 degree heading. We then turned to 020 degrees and nothing else was said except ATC said I must have missed your readback.

Original NASA ASRS Text

Title: S80 TURNS TO WRONG ASSIGNED HDG DEPARTING LGA.

Narrative: N90 APCH GAVE US WHAT WE THOUGHT WAS A 040 DEG HDG AND WE READ IT BACK THAT WAY. 3 MINS LATER THEY ASKED WHAT HDG WERE WE FLYING, I SAID 040 DEGS ASSIGNED, AND THEY SAID WE WERE ASSIGNED 340 DEG HDG. WE THEN TURNED TO 020 DEGS AND NOTHING ELSE WAS SAID EXCEPT ATC SAID I MUST HAVE MISSED YOUR READBACK.

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.