DO328 crew took off without takeoff clearance at ord.

Attributes
ACN	531273
Time
Date	200111
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : ord.airport
State Reference	IL
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Do 328 TP (Turboprop)
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	ground : takeoff roll
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 : 155 flight time total : 3250 flight time type : 355
ASRS Report	531273
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	non adherence : clearance non adherence : far non adherence : published procedure other anomaly other other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact other
Consequence	faa : reviewed incident with flight crew faa : investigated
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance Airport Company FAA
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After completion of the 'before takeoff checklist, below the line', we departed runway 27L at ord. During climb out, we were instructed to copy a telephone number for ord tower. After our landing ZZZ, us, we called the tower and discovered we allegedly took off without a proper clearance. This event was likely caused by radio chatter as our company requires us to monitor our operations frequency as well as normal ATC communications. Also due to the lack of traffic tower was working several runways at once. Add to this bleed over from other controllers, and pilot fatigue and you have a possibility of this happening. This may have been prevented by a tangible, physical action confirming we have been cleared to go, such as turning on the landing lights, etc. Vigilance is very important, as it only takes a heart beat to destroy a career.

Original NASA ASRS Text

Title: DO328 CREW TOOK OFF WITHOUT TKOF CLRNC AT ORD.

Narrative: AFTER COMPLETION OF THE 'BEFORE TKOF CHKLIST, BELOW THE LINE', WE DEPARTED RWY 27L AT ORD. DURING CLBOUT, WE WERE INSTRUCTED TO COPY A TELEPHONE NUMBER FOR ORD TWR. AFTER OUR LNDG ZZZ, US, WE CALLED THE TWR AND DISCOVERED WE ALLEGEDLY TOOK OFF WITHOUT A PROPER CLRNC. THIS EVENT WAS LIKELY CAUSED BY RADIO CHATTER AS OUR COMPANY REQUIRES US TO MONITOR OUR OPS FREQ AS WELL AS NORMAL ATC COMS. ALSO DUE TO THE LACK OF TFC TWR WAS WORKING SEVERAL RWYS AT ONCE. ADD TO THIS BLEED OVER FROM OTHER CTLRS, AND PLT FATIGUE AND YOU HAVE A POSSIBILITY OF THIS HAPPENING. THIS MAY HAVE BEEN PREVENTED BY A TANGIBLE, PHYSICAL ACTION CONFIRMING WE HAVE BEEN CLRED TO GO, SUCH AS TURNING ON THE LNDG LIGHTS, ETC. VIGILANCE IS VERY IMPORTANT, AS IT ONLY TAKES A HEART BEAT TO DESTROY A CAREER.

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.