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Unauthorized takeoff when air carrier medium large transport does not possess the correct takeoff data for runway length required remaining.
| Attributes | |
| ACN | 270550 |
| Time | |
| Date | 199405 |
| 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 | |
| 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 : holding ground other : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : flight engineer |
| Experience | flight time last 90 days : 180 flight time total : 3600 flight time type : 1400 |
| ASRS Report | 270550 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : far non adherence : published procedure non adherence : clearance non adherence other 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:
Flight cleared to taxi to 32L, T10 intersection takeoff via microphone and tango txwys. Crew busy with runway change and change in release fuel. This necessitated new takeoff data. These distrs resulted in crew missing the T10 intersection and taking 32L on the T9 intersection. Ord tower asked if we could accept takeoff clearance from that point. We accepted the takeoff clearance and rest of flight was uneventful. We accepted clearance based on our aircraft weight relatively light at 108000 and over 8000 ft of available runway. In reality we were not 'takeoff legal' based on the fact that we did not possess takeoff data for 32L from T9 intersection. In retrospect, crew should have either back taxied to takeoff with tower permission or held short and obtained new takeoff data for that point.
Original NASA ASRS Text
Title: UNAUTH TKOF WHEN ACR MLG DOES NOT POSSESS THE CORRECT TKOF DATA FOR RWY LENGTH REQUIRED REMAINING.
Narrative: FLT CLRED TO TAXI TO 32L, T10 INTXN TKOF VIA MIKE AND TANGO TXWYS. CREW BUSY WITH RWY CHANGE AND CHANGE IN RELEASE FUEL. THIS NECESSITATED NEW TKOF DATA. THESE DISTRS RESULTED IN CREW MISSING THE T10 INTXN AND TAKING 32L ON THE T9 INTXN. ORD TWR ASKED IF WE COULD ACCEPT TKOF CLRNC FROM THAT POINT. WE ACCEPTED THE TKOF CLRNC AND REST OF FLT WAS UNEVENTFUL. WE ACCEPTED CLRNC BASED ON OUR ACFT WT RELATIVELY LIGHT AT 108000 AND OVER 8000 FT OF AVAILABLE RWY. IN REALITY WE WERE NOT 'TKOF LEGAL' BASED ON THE FACT THAT WE DID NOT POSSESS TKOF DATA FOR 32L FROM T9 INTXN. IN RETROSPECT, CREW SHOULD HAVE EITHER BACK TAXIED TO TKOF WITH TWR PERMISSION OR HELD SHORT AND OBTAINED NEW TKOF DATA FOR THAT POINT.
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.