Pilot of an small transport taxied onto runway and started takeoff without clearance resulting in tower intervention to abort the takeoff and clear the runway at once.

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Attributes
ACN	350821
Time
Date	199610
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : arb
State Reference	MI
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : eyw
Operator	common carrier : air taxi
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff other
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 44 flight time total : 2880 flight time type : 44
ASRS Report	350821
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	incursion : runway non adherence : far non adherence : clearance other anomaly other
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:

There was a lot of banner towing in progress and constant dropping of banners. Takeoff clearance was difficult to get. Then the controller asked whether I could make it and I replied yes. I then taxied to the runway in use and proceeded to begin the takeoff run. Then the controller alerted me about where I was going, then I realized something was wrong and immediately closed throttles. I was then asked to expedite clearing the runway which I did, but later taxied to holding point of runway 24. I believed it was caused by non standard phraseology at critical time. So I see that if you find yourself in a situation where unusual events prevent you from getting your takeoff clearance any communication between you and the tower have to be checked and clarified. Like in this case, the tower will try to get you off as soon as possible while juggling the other participants of the unusual event. Misunderstanding can be life. When the pressure mounts, slow down. Factors: unexpected delay to an IFR traffic. Aircraft was not visible from control tower where it was on holding point. A number of slower planes doing unusual thing at airport.

Original NASA ASRS Text

Title: PLT OF AN SMT TAXIED ONTO RWY AND STARTED TKOF WITHOUT CLRNC RESULTING IN TWR INTERVENTION TO ABORT THE TKOF AND CLR THE RWY AT ONCE.

Narrative: THERE WAS A LOT OF BANNER TOWING IN PROGRESS AND CONSTANT DROPPING OF BANNERS. TKOF CLRNC WAS DIFFICULT TO GET. THEN THE CTLR ASKED WHETHER I COULD MAKE IT AND I REPLIED YES. I THEN TAXIED TO THE RWY IN USE AND PROCEEDED TO BEGIN THE TKOF RUN. THEN THE CTLR ALERTED ME ABOUT WHERE I WAS GOING, THEN I REALIZED SOMETHING WAS WRONG AND IMMEDIATELY CLOSED THROTTLES. I WAS THEN ASKED TO EXPEDITE CLRING THE RWY WHICH I DID, BUT LATER TAXIED TO HOLDING POINT OF RWY 24. I BELIEVED IT WAS CAUSED BY NON STANDARD PHRASEOLOGY AT CRITICAL TIME. SO I SEE THAT IF YOU FIND YOURSELF IN A SIT WHERE UNUSUAL EVENTS PREVENT YOU FROM GETTING YOUR TKOF CLRNC ANY COM BTWN YOU AND THE TWR HAVE TO BE CHKED AND CLARIFIED. LIKE IN THIS CASE, THE TWR WILL TRY TO GET YOU OFF AS SOON AS POSSIBLE WHILE JUGGLING THE OTHER PARTICIPANTS OF THE UNUSUAL EVENT. MISUNDERSTANDING CAN BE LIFE. WHEN THE PRESSURE MOUNTS, SLOW DOWN. FACTORS: UNEXPECTED DELAY TO AN IFR TFC. ACFT WAS NOT VISIBLE FROM CTL TWR WHERE IT WAS ON HOLDING POINT. A NUMBER OF SLOWER PLANES DOING UNUSUAL THING AT ARPT.

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.