Started takeoff without clearance, aborted.

Attributes
ACN	238608
Time
Date	199304
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : nbg
State Reference	LA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	other
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : takeoff other
Flight Plan	VFR
Person 1
Affiliation	government other
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp pilot : commercial
Experience	flight time last 90 days : 75 flight time total : 6500 flight time type : 175
ASRS Report	238608
Person 2
Affiliation	government other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	non adherence : far non adherence : clearance
Independent Detector	other controllera
Resolutory Action	flight crew : rejected takeoff other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Copilot position filed by company instructor pilot. Instructor pilot was working the radios. Navy tower had us back taxi on the runway to position and hold. Instructor pilot was talking to our company on tactical frequency. I finished takeoff checklist and instructor pilot said let's go. I asked are we cleared. He said yes. 1/2 through takeoff roll, tower said we were not cleared for takeoff. We aborted and taxied back to try again, after brakes cooled. Lesson: both crew should monitor critical radio xmissions, and if in doubt, call for verification. It's easy. Also, pre takeoff is not the time to get involved in non ATC radio communications.

Original NASA ASRS Text

Title: STARTED TKOF WITHOUT CLRNC, ABORTED.

Narrative: COPLT POS FILED BY COMPANY INSTRUCTOR PLT. INSTRUCTOR PLT WAS WORKING THE RADIOS. NAVY TWR HAD US BACK TAXI ON THE RWY TO POS AND HOLD. INSTRUCTOR PLT WAS TALKING TO OUR COMPANY ON TACTICAL FREQ. I FINISHED TKOF CHKLIST AND INSTRUCTOR PLT SAID LET'S GO. I ASKED ARE WE CLRED. HE SAID YES. 1/2 THROUGH TKOF ROLL, TWR SAID WE WERE NOT CLRED FOR TKOF. WE ABORTED AND TAXIED BACK TO TRY AGAIN, AFTER BRAKES COOLED. LESSON: BOTH CREW SHOULD MONITOR CRITICAL RADIO XMISSIONS, AND IF IN DOUBT, CALL FOR VERIFICATION. IT'S EASY. ALSO, PRE TKOF IS NOT THE TIME TO GET INVOLVED IN NON ATC RADIO COMS.

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.