An small transport twin takes off without permission at lal, fl. The pilot clears another aircraft t...

Attributes
ACN	425843
Time
Date	199901
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lal
State Reference	FL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	ground other : taxi
Flight Plan	None
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	ground other : taxi
Person 1
Affiliation	Other
Function	flight crew : single pilot
Experience	flight time last 90 days : 25 flight time total : 700 flight time type : 20
ASRS Report	425843
Person 2
Affiliation	Other
Function	flight crew : single pilot
Events
Anomaly	conflict : ground critical incursion : runway non adherence : far non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Miss Distance	horizontal : 50 vertical : 500
Supplementary
Air Traffic Incident	Pilot Deviation other

Narrative:

Controller said, 'cleared into position and hold.' I understood 'cleared for takeoff.' I cleared taxiing aircraft by 500 ft.

Original NASA ASRS Text

Title: AN SMT TWIN TAKES OFF WITHOUT PERMISSION AT LAL, FL. THE PLT CLRS ANOTHER ACFT TAXIING BY 500 FT.

Narrative: CTLR SAID, 'CLRED INTO POS AND HOLD.' I UNDERSTOOD 'CLRED FOR TKOF.' I CLRED TAXIING ACFT BY 500 FT.

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.

An small transport twin takes off without permission at lal, fl. The pilot clears another aircraft taxiing by 500 ft.