GLF3 crew had runway incursion at ilg.

Attributes
ACN	495872
Time
Date	200012
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ilg.airport
State Reference	DE
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Gulfstream III
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 100 flight time total : 12500 flight time type : 1400
ASRS Report	495872
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	incursion : runway non adherence : published procedure non adherence : company policies non adherence : clearance non adherence : far other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance controller : issued alert none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Taxiing out, ground control advised us to contact tower. We both believed that we heard that we were cleared for takeoff. I then asked for wind check. We proceeded to taxi onto runway for takeoff. As we were turning to line up, tower asked what we were doing and advised that we had not been cleared for takeoff. He then issued takeoff clearance. No conflict. I tried to contact tower chief to see if we could review tapes on why both of us believed that we had clearance but was unavailable due to vacation.

Original NASA ASRS Text

Title: GLF3 CREW HAD RWY INCURSION AT ILG.

Narrative: TAXIING OUT, GND CTL ADVISED US TO CONTACT TWR. WE BOTH BELIEVED THAT WE HEARD THAT WE WERE CLRED FOR TKOF. I THEN ASKED FOR WIND CHK. WE PROCEEDED TO TAXI ONTO RWY FOR TKOF. AS WE WERE TURNING TO LINE UP, TWR ASKED WHAT WE WERE DOING AND ADVISED THAT WE HAD NOT BEEN CLRED FOR TKOF. HE THEN ISSUED TKOF CLRNC. NO CONFLICT. I TRIED TO CONTACT TWR CHIEF TO SEE IF WE COULD REVIEW TAPES ON WHY BOTH OF US BELIEVED THAT WE HAD CLRNC BUT WAS UNAVAILABLE DUE TO VACATION.

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.