Widebody transport aircraft makes takeoff without clearance.

Attributes
ACN	266207
Time
Date	199403
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : dtw
State Reference	MI
Altitude	agl bound lower : 500 agl bound upper : 500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dtw
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 : initial climbout : takeoff
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 210 flight time total : 7500 flight time type : 3000
ASRS Report	266207
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : published procedure non adherence : far other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

May have departed dtw without IFR clearance on flight dtw-sel mar/xx/94. After takeoff in VFR conditions, ATC issued us transponder code and cleared us direct to first flight planned fix flight plan route.

Original NASA ASRS Text

Title: WDB ACFT MAKES TKOF WITHOUT CLRNC.

Narrative: MAY HAVE DEPARTED DTW WITHOUT IFR CLRNC ON FLT DTW-SEL MAR/XX/94. AFTER TKOF IN VFR CONDITIONS, ATC ISSUED US XPONDER CODE AND CLRED US DIRECT TO FIRST FLT PLANNED FIX FLT PLAN RTE.

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.