Medium large transport departs at runway intersection instead of runway end.

Attributes
ACN	223348
Time
Date	199210
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 14000 flight time type : 1000
ASRS Report	223348
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 320 flight time total : 9000 flight time type : 1100
ASRS Report	223078
Events
Anomaly	incursion : runway non adherence : published procedure non adherence : clearance
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Heavy taxiway traffic and radio frequency congestion. At night, in an area of much recent construction, I apparently mistook the twig intersection for the full length run-up area of 27L. Tower had issued takeoff clearance twice as we taxied east on the parallel and after a brief comment or question on our entrance to the runway cleared us a third time. Flight departed without incident. On reviewing events later we concluded that we had departed from twig rather than full length. Although the airport was very busy, no one was in front of us on this particular route. Tower was obviously eager to get rid of us. Twig, which joins the cargo, parallel and 27L had been constructed since I'd been in that location and I was aware of the danger of continuing too far on the parallel which passes the end of 27L and continues to 22L.

Original NASA ASRS Text

Title: MLG DEPARTS AT RWY INTXN INSTEAD OF RWY END.

Narrative: HVY TAXIWAY TFC AND RADIO FREQ CONGESTION. AT NIGHT, IN AN AREA OF MUCH RECENT CONSTRUCTION, I APPARENTLY MISTOOK THE TWIG INTXN FOR THE FULL LENGTH RUN-UP AREA OF 27L. TWR HAD ISSUED TKOF CLRNC TWICE AS WE TAXIED E ON THE PARALLEL AND AFTER A BRIEF COMMENT OR QUESTION ON OUR ENTRANCE TO THE RWY CLRED US A THIRD TIME. FLT DEPARTED WITHOUT INCIDENT. ON REVIEWING EVENTS LATER WE CONCLUDED THAT WE HAD DEPARTED FROM TWIG RATHER THAN FULL LENGTH. ALTHOUGH THE ARPT WAS VERY BUSY, NO ONE WAS IN FRONT OF US ON THIS PARTICULAR RTE. TWR WAS OBVIOUSLY EAGER TO GET RID OF US. TWIG, WHICH JOINS THE CARGO, PARALLEL AND 27L HAD BEEN CONSTRUCTED SINCE I'D BEEN IN THAT LOCATION AND I WAS AWARE OF THE DANGER OF CONTINUING TOO FAR ON THE PARALLEL WHICH PASSES THE END OF 27L AND CONTINUES TO 22L.

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.