 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
B737-300 initiated high speed abort after encountering airspeed loss/windshear on takeoff roll.
| Attributes | |
| ACN | 742798 |
| Time | |
| Date | 200706 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : den.airport |
| State Reference | CO |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | Windshear |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : takeoff roll |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 200 flight time total : 10000 flight time type : 3000 |
| ASRS Report | 742798 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 124 flight time total : 5000 flight time type : 818 |
| ASRS Report | 743089 |
| Events | |
| Anomaly | ground encounters other other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : rejected takeoff |
| Supplementary | |
| Problem Areas | Environmental Factor |
| Primary Problem | Environmental Factor |
Narrative:
We had delayed takeoff for windshear consideration. No reported windshear at time of takeoff roll. First officer made one call of airspeed hang up. I noted the speed tape and it was not negative. At 140 KTS; the first officer called hang up once again. I noted the airspeed tape at a minimum 10 KT negative trend. At the same time; I was applying full or nearly full right rudder. I then aborted the takeoff. We did clear the runway. We asked for assistance in the form of fire trucks when the abort was first reported to tower. They didn't hear us and sent us over to ground. Fire trucks were asked for three times. At one time I asked ground if they could see any smoke coming from our mains. I don't think I ever received an answer. We couldn't get it conveyed to ATC that we were not going to taxi any further and we needed fire assistance. Supplemental information from acn 743089: fire rescue arrived and were great in communicating with us. They chocked the nosewheel right away and gave us information on the condition of the aircraft. One right main mount tire seemed to be low and there was some debris under the tire. After our communications with tower during/after the abort; I felt as if ATC did not understand that we needed to stay put and had requested firefighting assistance. The flight attendants were great at keeping everyone in the seats and assisting the customers while we coordinated the transportation.
Original NASA ASRS Text
Title: B737-300 INITIATED HIGH SPEED ABORT AFTER ENCOUNTERING AIRSPEED LOSS/WINDSHEAR ON TKOF ROLL.
Narrative: WE HAD DELAYED TKOF FOR WINDSHEAR CONSIDERATION. NO RPTED WINDSHEAR AT TIME OF TKOF ROLL. FO MADE ONE CALL OF AIRSPD HANG UP. I NOTED THE SPD TAPE AND IT WAS NOT NEGATIVE. AT 140 KTS; THE FO CALLED HANG UP ONCE AGAIN. I NOTED THE AIRSPD TAPE AT A MINIMUM 10 KT NEGATIVE TREND. AT THE SAME TIME; I WAS APPLYING FULL OR NEARLY FULL R RUDDER. I THEN ABORTED THE TKOF. WE DID CLR THE RWY. WE ASKED FOR ASSISTANCE IN THE FORM OF FIRE TRUCKS WHEN THE ABORT WAS FIRST RPTED TO TWR. THEY DIDN'T HEAR US AND SENT US OVER TO GND. FIRE TRUCKS WERE ASKED FOR THREE TIMES. AT ONE TIME I ASKED GND IF THEY COULD SEE ANY SMOKE COMING FROM OUR MAINS. I DON'T THINK I EVER RECEIVED AN ANSWER. WE COULDN'T GET IT CONVEYED TO ATC THAT WE WERE NOT GOING TO TAXI ANY FURTHER AND WE NEEDED FIRE ASSISTANCE. SUPPLEMENTAL INFO FROM ACN 743089: FIRE RESCUE ARRIVED AND WERE GREAT IN COMMUNICATING WITH US. THEY CHOCKED THE NOSEWHEEL RIGHT AWAY AND GAVE US INFO ON THE CONDITION OF THE ACFT. ONE R MAIN MOUNT TIRE SEEMED TO BE LOW AND THERE WAS SOME DEBRIS UNDER THE TIRE. AFTER OUR COMS WITH TWR DURING/AFTER THE ABORT; I FELT AS IF ATC DID NOT UNDERSTAND THAT WE NEEDED TO STAY PUT AND HAD REQUESTED FIREFIGHTING ASSISTANCE. THE FLT ATTENDANTS WERE GREAT AT KEEPING EVERYONE IN THE SEATS AND ASSISTING THE CUSTOMERS WHILE WE COORDINATED THE TRANSPORTATION.
Data retrieved from NASA's ASRS site as of January 2009 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.