Takeoff without a clearance.

Attributes
ACN	293221
Time
Date	199501
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mhv
State Reference	CA
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
Operating Under FAR Part	Part 91
Navigation In Use	Other Other
Flight Phase	climbout : takeoff
Flight Plan	VFR
Person 1
Affiliation	Other
Function	instruction : instructor oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 40 flight time total : 3980 flight time type : 250
ASRS Report	293221
Person 2
Affiliation	Other
Function	instruction : trainee
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	incursion : runway non adherence : published procedure non adherence : far non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

During a pilot chkout in aircraft, I was in right seat and the PF in left seat was new to type. As we taxied for takeoff we discussed with tower possibly doing an intersection takeoff. We decided to use full length and were cleared to back-taxi on runway and also for takeoff (we thought). While back-taxiing we briefed the takeoff procedures, turned around at the end of the runway, and departed. After takeoff the tower called and informed us that we had taken off without clearance. We were the only aircraft in the area so there was no traffic conflict. Apparently we were so busy briefing the takeoff and talking about aircraft procedures that neither pilot confirmed that we were actually cleared for takeoff.

Original NASA ASRS Text

Title: TKOF WITHOUT A CLRNC.

Narrative: DURING A PLT CHKOUT IN ACFT, I WAS IN R SEAT AND THE PF IN L SEAT WAS NEW TO TYPE. AS WE TAXIED FOR TKOF WE DISCUSSED WITH TWR POSSIBLY DOING AN INTXN TKOF. WE DECIDED TO USE FULL LENGTH AND WERE CLRED TO BACK-TAXI ON RWY AND ALSO FOR TKOF (WE THOUGHT). WHILE BACK-TAXIING WE BRIEFED THE TKOF PROCS, TURNED AROUND AT THE END OF THE RWY, AND DEPARTED. AFTER TKOF THE TWR CALLED AND INFORMED US THAT WE HAD TAKEN OFF WITHOUT CLRNC. WE WERE THE ONLY ACFT IN THE AREA SO THERE WAS NO TFC CONFLICT. APPARENTLY WE WERE SO BUSY BRIEFING THE TKOF AND TALKING ABOUT ACFT PROCS THAT NEITHER PLT CONFIRMED THAT WE WERE ACTUALLY CLRED FOR TKOF.

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.