Pilot of an smr twin took off without clearance.

Attributes
ACN	298409
Time
Date	199503
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : aus
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : alb
Operator	general aviation : corporate
Make Model Name	Golden Eagle 421
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 50 flight time total : 6000 flight time type : 3000
ASRS Report	298409
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	incursion : runway non adherence : clearance 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:

A loud discussion was going on in back when we were cleared into position and hold on runway 31L. I lined up, added power and departed (without benefit of takeoff clearance). Tower called traffic departing the parallel, but said nothing out of the ordinary. She turned us on course and handed us off to departure, who also said nothing unusual, until he asked me to call the supervisor. I thought about this all the way out, and could come up with nothing that would explain that. When we got down, I called in and talked to the supervisor, who explained what I did. I have absolutely no explanation of why I did that, nor do I remember being cleared to go (or of not being cleared to go). I've flown for this company and this airplane for 12 yrs, I'm used to them! I've never done this before, either.

Original NASA ASRS Text

Title: PLT OF AN SMR TWIN TOOK OFF WITHOUT CLRNC.

Narrative: A LOUD DISCUSSION WAS GOING ON IN BACK WHEN WE WERE CLRED INTO POS AND HOLD ON RWY 31L. I LINED UP, ADDED PWR AND DEPARTED (WITHOUT BENEFIT OF TKOF CLRNC). TWR CALLED TFC DEPARTING THE PARALLEL, BUT SAID NOTHING OUT OF THE ORDINARY. SHE TURNED US ON COURSE AND HANDED US OFF TO DEP, WHO ALSO SAID NOTHING UNUSUAL, UNTIL HE ASKED ME TO CALL THE SUPVR. I THOUGHT ABOUT THIS ALL THE WAY OUT, AND COULD COME UP WITH NOTHING THAT WOULD EXPLAIN THAT. WHEN WE GOT DOWN, I CALLED IN AND TALKED TO THE SUPVR, WHO EXPLAINED WHAT I DID. I HAVE ABSOLUTELY NO EXPLANATION OF WHY I DID THAT, NOR DO I REMEMBER BEING CLRED TO GO (OR OF NOT BEING CLRED TO GO). I'VE FLOWN FOR THIS COMPANY AND THIS AIRPLANE FOR 12 YRS, I'M USED TO THEM! I'VE NEVER DONE THIS BEFORE, EITHER.

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.