Commuter aircraft turns to assigned heading, then informed heading is wrong.

Attributes
ACN	305510
Time
Date	199505
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : iad
State Reference	VA
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : iad tracon : sea
Operator	common carrier : air carrier
Make Model Name	Jetstream 41
Operating Under FAR Part	other : unknown
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 100 flight time total : 3500 flight time type : 50
ASRS Report	305510
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After takeoff and switch from tower to departure control, ATC assigned heading 250 degrees, vectors for the climb. PNF (myself) set heading bug to 250 degrees and PF verified setting on his ehsi. PNF also read back assigned heading to ATC. Approximately 1-2 mins later, ATC asked us to 'say heading.' I responded 'heading 250 degrees assigned.' controller then said that 350 degrees was the assigned heading. Aircraft was turned to 350 degrees and to our knowledge no required separation was lost.

Original NASA ASRS Text

Title: COMMUTER ACFT TURNS TO ASSIGNED HDG, THEN INFORMED HDG IS WRONG.

Narrative: AFTER TKOF AND SWITCH FROM TWR TO DEP CTL, ATC ASSIGNED HDG 250 DEGS, VECTORS FOR THE CLB. PNF (MYSELF) SET HDG BUG TO 250 DEGS AND PF VERIFIED SETTING ON HIS EHSI. PNF ALSO READ BACK ASSIGNED HDG TO ATC. APPROX 1-2 MINS LATER, ATC ASKED US TO 'SAY HDG.' I RESPONDED 'HDG 250 DEGS ASSIGNED.' CTLR THEN SAID THAT 350 DEGS WAS THE ASSIGNED HDG. ACFT WAS TURNED TO 350 DEGS AND TO OUR KNOWLEDGE NO REQUIRED SEPARATION WAS LOST.

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.