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An MD80 flight crew while climbing through 800 ft AGL meets with an unexpected windshear condition just 4 mi behind a departure B757. First officer PF executes a maximum thrust power application and increases speed. No turbulence throughout this event.
| Attributes | |
| ACN | 389050 |
| Time | |
| Date | 199712 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | agl bound lower : 800 agl bound upper : 800 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : dfw |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | climbout : takeoff climbout : initial |
| Route In Use | departure other enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : takeoff climbout : initial climbout : intermediate altitude |
| Route In Use | departure other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 8000 flight time type : 3000 |
| ASRS Report | 389050 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 16000 flight time type : 5000 |
| ASRS Report | 389338 |
| Events | |
| Anomaly | inflight encounter other other anomaly other anomaly other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : declared emergency flight crew : regained aircraft control other |
| Consequence | Other |
| Miss Distance | horizontal : 24000 |
Narrative:
Flight departed dfw on runway 35L. We were following a B757 approximately 4 mi and had allowed 2 mins for separation. I rotated smoothly and was climbing out at about V2 +20 with flaps and slats extended. We received a visual and aural windshear alert followed by a loss of about 40 KIAS. PF responded with immediate action of emergency procedures: disconnected autothrottles and went to maximum power. I followed command bars to reduce pitch to about 5 degrees nose up. Outside air temperature was 12 degrees C on the ram air temperature and we were in smooth air and light rain. We had no violent moment, just a smooth roll-off of airspeed. We made a PIREP about our encounter to dfw departure control.
Original NASA ASRS Text
Title: AN MD80 FLC WHILE CLBING THROUGH 800 FT AGL MEETS WITH AN UNEXPECTED WINDSHEAR CONDITION JUST 4 MI BEHIND A DEP B757. FO PF EXECUTES A MAX THRUST PWR APPLICATION AND INCREASES SPD. NO TURB THROUGHOUT THIS EVENT.
Narrative: FLT DEPARTED DFW ON RWY 35L. WE WERE FOLLOWING A B757 APPROX 4 MI AND HAD ALLOWED 2 MINS FOR SEPARATION. I ROTATED SMOOTHLY AND WAS CLBING OUT AT ABOUT V2 +20 WITH FLAPS AND SLATS EXTENDED. WE RECEIVED A VISUAL AND AURAL WINDSHEAR ALERT FOLLOWED BY A LOSS OF ABOUT 40 KIAS. PF RESPONDED WITH IMMEDIATE ACTION OF EMER PROCS: DISCONNECTED AUTOTHROTTLES AND WENT TO MAX PWR. I FOLLOWED COMMAND BARS TO REDUCE PITCH TO ABOUT 5 DEGS NOSE UP. OUTSIDE AIR TEMP WAS 12 DEGS C ON THE RAM AIR TEMP AND WE WERE IN SMOOTH AIR AND LIGHT RAIN. WE HAD NO VIOLENT MOMENT, JUST A SMOOTH ROLL-OFF OF AIRSPD. WE MADE A PIREP ABOUT OUR ENCOUNTER TO DFW DEP CTL.
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.