Unauthorized runway operation in performing a takeoff from an intersection without takeoff data.

Attributes
ACN	295736
Time
Date	199502
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : enw
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : takeoff ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 6800 flight time type : 210
ASRS Report	295736
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : published procedure non adherence : far non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

During engine start we had to perform irregular engine start procedure. During taxi out I had to leave ATC frequency resolve irregular procedure with line maintenance. This lead to an extra heavy workload on taxi out. I also lost situtational awareness with ATC. Upon rejoining the captain on ATC frequency we were cleared for takeoff runway 22L. (Approximately 8000 ft runway). The captain entered runway at first intersection (approximately 500 ft from end). This was due to misunderstanding with ATC. Ord tower pointed out the mistake and asked for our intentions. I recommended we back taxi to the end of runway 22L. The captain decided takeoff from that intersection. His reasons were as follows. Runway limit weight 239000 pounds. Our actual weight 208000 pounds. Leaving us 30000 pounds to spare. Because we were on the runway I felt I had limited time to discuss this with the captain!!! I decided to devote my attention to helping him perform the safest possible takeoff. However I feel we should have back taxied to end of runway 22L. The takeoff was uneventful.

Original NASA ASRS Text

Title: UNAUTH RWY OP IN PERFORMING A TKOF FROM AN INTXN WITHOUT TKOF DATA.

Narrative: DURING ENG START WE HAD TO PERFORM IRREGULAR ENG START PROC. DURING TAXI OUT I HAD TO LEAVE ATC FREQ RESOLVE IRREGULAR PROC WITH LINE MAINT. THIS LEAD TO AN EXTRA HVY WORKLOAD ON TAXI OUT. I ALSO LOST SITUTATIONAL AWARENESS WITH ATC. UPON REJOINING THE CAPT ON ATC FREQ WE WERE CLRED FOR TKOF RWY 22L. (APPROX 8000 FT RWY). THE CAPT ENTERED RWY AT FIRST INTXN (APPROX 500 FT FROM END). THIS WAS DUE TO MISUNDERSTANDING WITH ATC. ORD TWR POINTED OUT THE MISTAKE AND ASKED FOR OUR INTENTIONS. I RECOMMENDED WE BACK TAXI TO THE END OF RWY 22L. THE CAPT DECIDED TKOF FROM THAT INTXN. HIS REASONS WERE AS FOLLOWS. RWY LIMIT WT 239000 LBS. OUR ACTUAL WT 208000 LBS. LEAVING US 30000 LBS TO SPARE. BECAUSE WE WERE ON THE RWY I FELT I HAD LIMITED TIME TO DISCUSS THIS WITH THE CAPT!!! I DECIDED TO DEVOTE MY ATTN TO HELPING HIM PERFORM THE SAFEST POSSIBLE TKOF. HOWEVER I FEEL WE SHOULD HAVE BACK TAXIED TO END OF RWY 22L. THE TKOF WAS UNEVENTFUL.

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.