Pilot deviation -- cpr a did not comply with tower instruction to cancel takeoff clearance.

Attributes
ACN	279789
Time
Date	199408
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : tpa
State Reference	FL
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground other : taxi
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 100 flight time total : 5600 flight time type : 1000
ASRS Report	279789
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	conflict : ground less severe incursion : runway non adherence : required legal separation non adherence : clearance
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 1000 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

My airplane was cleared for takeoff on runway 27 at tpa international. During takeoff roll I noticed a B727 taxi across runway. As things continued I thought it unusual, but no immediate separation problem seemed imminent. I could determine that the B727 would safely clear the runway prior to my reaching his point so I elected to continue. I did hear garbled and unclr communications at this time as to a taxiing aircraft. The takeoff was uneventful but due to the high decibel levels at maximum power output (no headset worn) the communications were not clear. After departure the tower controller asked me if I heard to 'cancel takeoff clearance' which I did not and confessed so to controller, 'that I did not hear him cancel my takeoff.' I feel the problem was lack of ground controller and local controller coordination and the fact his instruction apparently came just as I had applied maximum power for takeoff with the sharp decibel level rise in the cockpit at that moment. I don't like headsets but a headset might have helped here but anyway in this instance there was not a serious airplane to airplane separation conflict.

Original NASA ASRS Text

Title: PLTDEV -- CPR A DID NOT COMPLY WITH TWR INSTRUCTION TO CANCEL TKOF CLRNC.

Narrative: MY AIRPLANE WAS CLRED FOR TKOF ON RWY 27 AT TPA INTL. DURING TKOF ROLL I NOTICED A B727 TAXI ACROSS RWY. AS THINGS CONTINUED I THOUGHT IT UNUSUAL, BUT NO IMMEDIATE SEPARATION PROB SEEMED IMMINENT. I COULD DETERMINE THAT THE B727 WOULD SAFELY CLR THE RWY PRIOR TO MY REACHING HIS POINT SO I ELECTED TO CONTINUE. I DID HEAR GARBLED AND UNCLR COMS AT THIS TIME AS TO A TAXIING ACFT. THE TKOF WAS UNEVENTFUL BUT DUE TO THE HIGH DECIBEL LEVELS AT MAX PWR OUTPUT (NO HEADSET WORN) THE COMS WERE NOT CLR. AFTER DEP THE TWR CTLR ASKED ME IF I HEARD TO 'CANCEL TKOF CLRNC' WHICH I DID NOT AND CONFESSED SO TO CTLR, 'THAT I DID NOT HEAR HIM CANCEL MY TKOF.' I FEEL THE PROB WAS LACK OF GND CTLR AND LCL CTLR COORD AND THE FACT HIS INSTRUCTION APPARENTLY CAME JUST AS I HAD APPLIED MAX PWR FOR TKOF WITH THE SHARP DECIBEL LEVEL RISE IN THE COCKPIT AT THAT MOMENT. I DON'T LIKE HEADSETS BUT A HEADSET MIGHT HAVE HELPED HERE BUT ANYWAY IN THIS INSTANCE THERE WAS NOT A SERIOUS AIRPLANE TO AIRPLANE SEPARATION CONFLICT.

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.