Flight crew of an mdt failed to follow departure heading assigned by ATC resulting in ATC to restate clearance heading and turn aircraft back to assigned heading.

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Attributes
ACN	310510
Time
Date	199507
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : irw airport : okc
State Reference	OK
Altitude	agl bound lower : 2500 agl bound upper : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : okc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude climbout : initial
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 155 flight time total : 7500 flight time type : 800
ASRS Report	310510
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Picked up IFR clearance to dfw -- via the boids arrival which is okc 167 degree radial for 68 mi then the bpr 005 degree radial to bpr. Clearance was 'cleared as filed fly heading 200 degrees.' we understood this as fly 200 degree to join airway. We were late in changing frequency, ATC advised us we were not cleared to join airway. Unclr clearance from ATC and frequency change during climb checks contributed to this error.

Original NASA ASRS Text

Title: FLC OF AN MDT FAILED TO FOLLOW DEP HDG ASSIGNED BY ATC RESULTING IN ATC TO RESTATE CLRNC HDG AND TURN ACFT BACK TO ASSIGNED HDG.

Narrative: PICKED UP IFR CLRNC TO DFW -- VIA THE BOIDS ARR WHICH IS OKC 167 DEG RADIAL FOR 68 MI THEN THE BPR 005 DEG RADIAL TO BPR. CLRNC WAS 'CLRED AS FILED FLY HDG 200 DEGS.' WE UNDERSTOOD THIS AS FLY 200 DEG TO JOIN AIRWAY. WE WERE LATE IN CHANGING FREQ, ATC ADVISED US WE WERE NOT CLRED TO JOIN AIRWAY. UNCLR CLRNC FROM ATC AND FREQ CHANGE DURING CLB CHKS CONTRIBUTED TO THIS ERROR.

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.