Unauthorized takeoff by cpr jet.

Attributes
ACN	245969
Time
Date	199307
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : grr
State Reference	MI
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : msy
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : takeoff ground : holding
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 6500 flight time type : 1000
ASRS Report	245969
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	incursion : runway 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:

Aircraft was stopped at hold short line for runway 26L, kgrr, when I heard cleared, and taxied onto runway, visually checked the runway was clear of other traffic that had just landed, and advanced the power levers for takeoff. Takeoff roll was 6000 ft plus, due to aircraft being heavy and air temperature of 88 degrees F. After rotation and gear retraction tower then informed us we did not receive a takeoff clearance. Neither pilot could remember an into position and hold clearance. Did not question the tower controller. We just acknowledged the frequency change to departure and continued the flight. There was no conflict with any other traffic visually or on TCASII and I wonder why it took tower so long to wake up to the fact that we were on takeoff roll without a clearance if that was in fact what happened. In the future I will pay much closer attention to what the controller is saying. I also recommended only using the word 'cleared' for takeoff or landing clrncs and not in the context of 'position and hold.'

Original NASA ASRS Text

Title: UNAUTH TKOF BY CPR JET.

Narrative: ACFT WAS STOPPED AT HOLD SHORT LINE FOR RWY 26L, KGRR, WHEN I HEARD CLRED, AND TAXIED ONTO RWY, VISUALLY CHKED THE RWY WAS CLR OF OTHER TFC THAT HAD JUST LANDED, AND ADVANCED THE PWR LEVERS FOR TKOF. TKOF ROLL WAS 6000 FT PLUS, DUE TO ACFT BEING HVY AND AIR TEMP OF 88 DEGS F. AFTER ROTATION AND GEAR RETRACTION TWR THEN INFORMED US WE DID NOT RECEIVE A TKOF CLRNC. NEITHER PLT COULD REMEMBER AN INTO POS AND HOLD CLRNC. DID NOT QUESTION THE TWR CTLR. WE JUST ACKNOWLEDGED THE FREQ CHANGE TO DEP AND CONTINUED THE FLT. THERE WAS NO CONFLICT WITH ANY OTHER TFC VISUALLY OR ON TCASII AND I WONDER WHY IT TOOK TWR SO LONG TO WAKE UP TO THE FACT THAT WE WERE ON TKOF ROLL WITHOUT A CLRNC IF THAT WAS IN FACT WHAT HAPPENED. IN THE FUTURE I WILL PAY MUCH CLOSER ATTN TO WHAT THE CTLR IS SAYING. I ALSO RECOMMENDED ONLY USING THE WORD 'CLRED' FOR TKOF OR LNDG CLRNCS AND NOT IN THE CONTEXT OF 'POS AND HOLD.'

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.