Pilot of small aircraft enters runway and takes off without clearance at sac after observing a citation jet land over him after cleared into position and hold by sac local controller.

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Attributes
ACN	616964
Time
Date	200405
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sac.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tower : sac.tower tower : atl.tower
Operator	general aviation : personal
Make Model Name	Small Aircraft
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	ground : takeoff roll ground : position and hold
Route In Use	departure : vfr
Flight Plan	VFR
Aircraft 2
Controlling Facilities	tower : sac.tower
Make Model Name	Cessna Citation Undifferentiated or Other Model
Flight Phase	landing : roll
Route In Use	approach : traffic pattern
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private
Experience	flight time last 90 days : 25.8 flight time total : 1970 flight time type : 1730
ASRS Report	616964
Events
Anomaly	conflict : ground critical incursion : runway non adherence : clearance non adherence : far non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Airport ATC Human Performance Flight Crew Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was cleared to 'runway 20 to position and hold.' sitting there waiting, a twin jet (a citation) landed over me on runway 20. He took most of the runway to stop. As he proceeded to taxi off of the runway, I said to myself, 'he's clear now, I guess I can take off now.' I took off, flew to yolo county, svced my aircraft with fuel, then back to executive airport. After landing, as I taxied in the tower gave me their phone number, and told me to call them after I parked. I called and the tower operator told me he would have to turn in a report on my runway incursion. I told him the jet was clear of the runway. He said the tail of the jet was still over the edge of the runway's side. When I passed over where the jet was, I must have been at least 200-300 ft high. The tower could have told me to abort the takeoff roll, which I would have done easily. This does not excuse my taking off. That was just a case of head up and locked. I was sitting there and saw the jet taxi off the runway and assumed I was clear to go.

Original NASA ASRS Text

Title: PLT OF SMA ENTERS RWY AND TAKES OFF WITHOUT CLRNC AT SAC AFTER OBSERVING A CITATION JET LAND OVER HIM AFTER CLRED INTO POS AND HOLD BY SAC LCL CTLR.

Narrative: I WAS CLRED TO 'RWY 20 TO POS AND HOLD.' SITTING THERE WAITING, A TWIN JET (A CITATION) LANDED OVER ME ON RWY 20. HE TOOK MOST OF THE RWY TO STOP. AS HE PROCEEDED TO TAXI OFF OF THE RWY, I SAID TO MYSELF, 'HE'S CLR NOW, I GUESS I CAN TAKE OFF NOW.' I TOOK OFF, FLEW TO YOLO COUNTY, SVCED MY ACFT WITH FUEL, THEN BACK TO EXECUTIVE ARPT. AFTER LNDG, AS I TAXIED IN THE TWR GAVE ME THEIR PHONE NUMBER, AND TOLD ME TO CALL THEM AFTER I PARKED. I CALLED AND THE TWR OPERATOR TOLD ME HE WOULD HAVE TO TURN IN A RPT ON MY RWY INCURSION. I TOLD HIM THE JET WAS CLR OF THE RWY. HE SAID THE TAIL OF THE JET WAS STILL OVER THE EDGE OF THE RWY'S SIDE. WHEN I PASSED OVER WHERE THE JET WAS, I MUST HAVE BEEN AT LEAST 200-300 FT HIGH. THE TWR COULD HAVE TOLD ME TO ABORT THE TKOF ROLL, WHICH I WOULD HAVE DONE EASILY. THIS DOES NOT EXCUSE MY TAKING OFF. THAT WAS JUST A CASE OF HEAD UP AND LOCKED. I WAS SITTING THERE AND SAW THE JET TAXI OFF THE RWY AND ASSUMED I WAS CLR TO GO.

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.