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B777 flight crew on departure from iad encounter windshear causing an airspeed increased and a 200 ft overshoot.
| Attributes | |
| ACN | 567574 |
| Time | |
| Date | 200212 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : iad.airport |
| State Reference | VA |
| Altitude | msl bound lower : 3000 msl bound upper : 3200 |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | Windshear |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | landing : go around |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : multi engine pilot : instrument pilot : commercial pilot : flight engineer |
| Experience | flight time last 90 days : 110 flight time total : 11142 flight time type : 900 |
| ASRS Report | 567574 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 60 flight time total : 8000 flight time type : 1150 |
| ASRS Report | 567575 |
| Events | |
| Anomaly | altitude deviation : overshoot inflight encounter : weather inflight encounter other non adherence : clearance other anomaly |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : returned to assigned altitude flight crew : exited adverse environment flight crew : overrode automation flight crew : regained aircraft control |
| Supplementary | |
| Problem Areas | Weather Flight Crew Human Performance Environmental Factor |
| Primary Problem | Weather |
Narrative:
On takeoff runway 30 iad, encountered windshear at approximately 800 ft AGL. First officer immediately reported shear encounter to tower. Due to shear encounter, slow flap retraction and high climb rate, we leveled off at 3200 ft MSL instead of 3000 ft MSL. Airspeed temporarily increased to 285 KIAS as we returned to level flight at 3000 ft MSL and engaged autoplt/autothrottles.
Original NASA ASRS Text
Title: B777 FLC ON DEP FROM IAD ENCOUNTER WINDSHEAR CAUSING AN AIRSPD INCREASED AND A 200 FT OVERSHOOT.
Narrative: ON TKOF RWY 30 IAD, ENCOUNTERED WINDSHEAR AT APPROX 800 FT AGL. FO IMMEDIATELY RPTED SHEAR ENCOUNTER TO TWR. DUE TO SHEAR ENCOUNTER, SLOW FLAP RETRACTION AND HIGH CLB RATE, WE LEVELED OFF AT 3200 FT MSL INSTEAD OF 3000 FT MSL. AIRSPD TEMPORARILY INCREASED TO 285 KIAS AS WE RETURNED TO LEVEL FLT AT 3000 FT MSL AND ENGAGED AUTOPLT/AUTOTHROTTLES.
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.