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Air carrier medium large transport aborts takeoff above 100 KTS on runway 13C at mdw for GA small transport Y crossing active runway without clearance.
| Attributes | |
| ACN | 174511 |
| Time | |
| Date | 199104 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : mdw |
| 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 |
| Flight Phase | climbout : takeoff other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Flight Phase | ground other : taxi landing other |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi pilot : flight engineer |
| Experience | flight time last 90 days : 230 flight time total : 9000 flight time type : 1100 |
| ASRS Report | 174511 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 10000 flight time type : 2000 |
| ASRS Report | 174775 |
| Events | |
| Anomaly | aircraft equipment problem : less severe incursion : runway non adherence : far non adherence : clearance other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : rejected takeoff |
| Consequence | Other |
| Miss Distance | horizontal : 1500 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Our flight, medium large transport X, was cleared for takeoff runway 13C. A light twin, small transport Y, had just landed 1 min before on runway 13L. Power was advanced and takeoff roll commenced with captain setting takeoff power. At approximately 100 KTS, I noticed an aircraft at departure end of runway at a fairly good taxi speed, approaching our runway. At the same time I heard the tower controller making several attempts to raise taxiway small transport Y on frequency to no avail. I told captain that I thought an aircraft was going to cross our runway downfield. The captain looked out and also observed intrusion ahead. Captain made decision to abort takeoff at approximately 115 KTS (11 KTS below V1). Small transport Y never did stop and tower was finally able to raise him once he crossed our runway. Our aircraft came to a stop about 2000' prior to where small transport Y crossed in front of us. If takeoff would have been continued at our fairly light weight, and with slightly more aggressive rotation than normal, we would have cleared small transport Y by 100-200'. Workload of local controls at the time was fairly busy. WX was good if MVFR or IFR. Our not being aware of a possible conflict situation could have had much more serious consequences. Supplemental information from acn 174775: tower controller made several attempts at requesting the aircraft to hold short of 13C with no response. The light twin did cross 13C. Red lighting along the hold liens on txwys may help avoid some of these problems.
Original NASA ASRS Text
Title: ACR MLG ABORTS TKOF ABOVE 100 KTS ON RWY 13C AT MDW FOR GA SMT Y CROSSING ACTIVE RWY WITHOUT CLRNC.
Narrative: OUR FLT, MLG X, WAS CLRED FOR TKOF RWY 13C. A LIGHT TWIN, SMT Y, HAD JUST LANDED 1 MIN BEFORE ON RWY 13L. PWR WAS ADVANCED AND TKOF ROLL COMMENCED WITH CAPT SETTING TKOF PWR. AT APPROX 100 KTS, I NOTICED AN ACFT AT DEP END OF RWY AT A FAIRLY GOOD TAXI SPD, APCHING OUR RWY. AT THE SAME TIME I HEARD THE TWR CTLR MAKING SEVERAL ATTEMPTS TO RAISE TXWY SMT Y ON FREQ TO NO AVAIL. I TOLD CAPT THAT I THOUGHT AN ACFT WAS GOING TO CROSS OUR RWY DOWNFIELD. THE CAPT LOOKED OUT AND ALSO OBSERVED INTRUSION AHEAD. CAPT MADE DECISION TO ABORT TKOF AT APPROX 115 KTS (11 KTS BELOW V1). SMT Y NEVER DID STOP AND TWR WAS FINALLY ABLE TO RAISE HIM ONCE HE CROSSED OUR RWY. OUR ACFT CAME TO A STOP ABOUT 2000' PRIOR TO WHERE SMT Y CROSSED IN FRONT OF US. IF TKOF WOULD HAVE BEEN CONTINUED AT OUR FAIRLY LIGHT WT, AND WITH SLIGHTLY MORE AGGRESSIVE ROTATION THAN NORMAL, WE WOULD HAVE CLRED SMT Y BY 100-200'. WORKLOAD OF LCL CTLS AT THE TIME WAS FAIRLY BUSY. WX WAS GOOD IF MVFR OR IFR. OUR NOT BEING AWARE OF A POSSIBLE CONFLICT SITUATION COULD HAVE HAD MUCH MORE SERIOUS CONSEQUENCES. SUPPLEMENTAL INFO FROM ACN 174775: TWR CTLR MADE SEVERAL ATTEMPTS AT REQUESTING THE ACFT TO HOLD SHORT OF 13C WITH NO RESPONSE. THE LIGHT TWIN DID CROSS 13C. RED LIGHTING ALONG THE HOLD LIENS ON TXWYS MAY HELP AVOID SOME OF THESE PROBS.
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.