A takeoff from the 'in position and hold' position without clearance from tower. Radio reception was...

Attributes
ACN	531842
Time
Date	200112
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : fxe.airport
State Reference	FL
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : teb.tower
Operator	Other
Make Model Name	Small Aircraft, Low Wing, 2 Eng, Retractable Gear
Operating Under FAR Part	other : 137
Flight Phase	ground : takeoff roll
Person 1
Affiliation	company other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : private
Experience	flight time last 90 days : 10 flight time total : 5000
ASRS Report	531842
Person 2
Affiliation	government : faa
Function	controller : local
Events
Anomaly	aircraft equipment problem : less severe incursion : runway non adherence : far non adherence : clearance
Independent Detector	other controllerb other flight crewa
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was in a beechcraft duchess. Ground control indicated he could not understand my radio clearly. After changing mikes, the communications seemed to be a little better. After run-up and when I was ready for takeoff, the tower may have had me confused with another duchess because he indicated he received calls from me, but I did not call him. Anyway, through the engine noise and radio noise, the tower cleared me to 'position and hold with an aircraft on a 3 mi final.' I taxied into position on the runway and thought I heard him say 'cleared for takeoff.' I replied and he may have again called back to me, but with all the radio noise, I may not have heard him. It appears I took off without the tower's permission. There was never any traffic conflict or safety was not a factor for other aircraft or myself. Next time, I will insure the radios are working better and more clear communications are established.

Original NASA ASRS Text

Title: A TKOF FROM THE 'IN POS AND HOLD' POS WITHOUT CLRNC FROM TWR. RADIO RECEPTION WAS AN ISSUE.

Narrative: I WAS IN A BEECHCRAFT DUCHESS. GND CTL INDICATED HE COULD NOT UNDERSTAND MY RADIO CLRLY. AFTER CHANGING MIKES, THE COMS SEEMED TO BE A LITTLE BETTER. AFTER RUN-UP AND WHEN I WAS READY FOR TKOF, THE TWR MAY HAVE HAD ME CONFUSED WITH ANOTHER DUCHESS BECAUSE HE INDICATED HE RECEIVED CALLS FROM ME, BUT I DID NOT CALL HIM. ANYWAY, THROUGH THE ENG NOISE AND RADIO NOISE, THE TWR CLRED ME TO 'POS AND HOLD WITH AN ACFT ON A 3 MI FINAL.' I TAXIED INTO POS ON THE RWY AND THOUGHT I HEARD HIM SAY 'CLRED FOR TKOF.' I REPLIED AND HE MAY HAVE AGAIN CALLED BACK TO ME, BUT WITH ALL THE RADIO NOISE, I MAY NOT HAVE HEARD HIM. IT APPEARS I TOOK OFF WITHOUT THE TWR'S PERMISSION. THERE WAS NEVER ANY TFC CONFLICT OR SAFETY WAS NOT A FACTOR FOR OTHER ACFT OR MYSELF. NEXT TIME, I WILL INSURE THE RADIOS ARE WORKING BETTER AND MORE CLR COMS ARE ESTABLISHED.

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.

A takeoff from the 'in position and hold' position without clearance from tower. Radio reception was an issue.