EMS small transport unauthorized takeoff from den at night.

Attributes
ACN	163015
Time
Date	199011
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : den
State Reference	CO
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : den tower : slc
Operator	common carrier : air taxi
Make Model Name	Small Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 100 flight time total : 8000 flight time type : 750
ASRS Report	163015
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	incursion : runway non adherence : far non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Flying on a lifeguard flight in an small transport, we took off on runway 35L (den). After takeoff the tower asked us if we had a takeoff clearance and we said that we thought so (the tower thought we were only position and hold). The tower then sent us over to departure control with no further discussion. I'm not positive whether or not we had a takeoff clearance. Contributing factors include the urgency of a lifeguard flight, good WX and no other traffic around.

Original NASA ASRS Text

Title: EMS SMT UNAUTH TKOF FROM DEN AT NIGHT.

Narrative: FLYING ON A LIFEGUARD FLT IN AN SMT, WE TOOK OFF ON RWY 35L (DEN). AFTER TKOF THE TWR ASKED US IF WE HAD A TKOF CLRNC AND WE SAID THAT WE THOUGHT SO (THE TWR THOUGHT WE WERE ONLY POS AND HOLD). THE TWR THEN SENT US OVER TO DEP CTL WITH NO FURTHER DISCUSSION. I'M NOT POSITIVE WHETHER OR NOT WE HAD A TKOF CLRNC. CONTRIBUTING FACTORS INCLUDE THE URGENCY OF A LIFEGUARD FLT, GOOD WX AND NO OTHER TFC AROUND.

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.