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Flight crew of large transport taking off at dca in heavy rain encountered windshear at approximately 30' AGL with loss of airspeed. Full thrust enabled the aircraft to be flown out of the emergency situation. Overtemperature of all three engines was noted but flight continued to destination.
| Attributes | |
| ACN | 119940 |
| Time | |
| Date | 198908 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : dca |
| State Reference | DC |
| Altitude | agl bound lower : 30 agl bound upper : 500 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tower : dca |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : takeoff climbout : initial |
| Route In Use | departure sid : sid |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 25 flight time total : 11700 flight time type : 4714 |
| ASRS Report | 119940 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | inflight encounter : weather other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : exited adverse environment none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
On takeoff from dca tower reported wind change from 060/6 to 120/6-7. On takeoff roll, with full takeoff thrust, 25 degree flap, rain became heavy, and at vr-10 visibility became nil. Very heavy rain. V1-122, vr-124, V2-137. Aircraft was rotated at vr. At about 30' AGL, 'airspeed' was called out and appeared to decrease to about 15 KTS below V2. Using our procedures, thrust levers were pushed to the maximum physical limit. Within several seconds, the aircraft broke out in the clear, and we had airspeed and better maneuverability. An acm on board, said he saw all engines in the red area even though at this time, on climbout, all engines appeared normal. I called our maintenance coordinator and relayed all information I had on the engines. After discussion, it was decided to continue to stl, and the engines would be checked there. I concurred, and the remainder of flight was normal.
Original NASA ASRS Text
Title: FLT CREW OF LGT TAKING OFF AT DCA IN HEAVY RAIN ENCOUNTERED WINDSHEAR AT APPROX 30' AGL WITH LOSS OF AIRSPEED. FULL THRUST ENABLED THE ACFT TO BE FLOWN OUT OF THE EMERGENCY SITUATION. OVERTEMPERATURE OF ALL THREE ENGINES WAS NOTED BUT FLT CONTINUED TO DESTINATION.
Narrative: ON TKOF FROM DCA TWR REPORTED WIND CHANGE FROM 060/6 TO 120/6-7. ON TKOF ROLL, WITH FULL TKOF THRUST, 25 DEG FLAP, RAIN BECAME HEAVY, AND AT VR-10 VISIBILITY BECAME NIL. VERY HEAVY RAIN. V1-122, VR-124, V2-137. ACFT WAS ROTATED AT VR. AT ABOUT 30' AGL, 'AIRSPEED' WAS CALLED OUT AND APPEARED TO DECREASE TO ABOUT 15 KTS BELOW V2. USING OUR PROCS, THRUST LEVERS WERE PUSHED TO THE MAX PHYSICAL LIMIT. WITHIN SEVERAL SECONDS, THE ACFT BROKE OUT IN THE CLEAR, AND WE HAD AIRSPEED AND BETTER MANEUVERABILITY. AN ACM ON BOARD, SAID HE SAW ALL ENGINES IN THE RED AREA EVEN THOUGH AT THIS TIME, ON CLIMBOUT, ALL ENGINES APPEARED NORMAL. I CALLED OUR MAINT COORDINATOR AND RELAYED ALL INFO I HAD ON THE ENGINES. AFTER DISCUSSION, IT WAS DECIDED TO CONTINUE TO STL, AND THE ENGINES WOULD BE CHECKED THERE. I CONCURRED, AND THE REMAINDER OF FLT WAS NORMAL.
Data retrieved from NASA's ASRS site as of August 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.