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MD11 pilot experiences windshear shortly after takeoff from anc and performs the windshear escape maneuver. At 4;000 ft severe turbulence is encountered resulting in control difficulties. After consultation with the company; the crew elects to land. On short final a positive airspeed gain of 30 KTS is experienced.
| Attributes | |
| ACN | 942826 |
| Time | |
| Date | 201104 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ANC.Airport |
| State Reference | AK |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | MD-11 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Person 1 | |
| Function | Pilot Not Flying |
| Experience | Flight Crew Last 90 Days 210 Flight Crew Total 7800 Flight Crew Type 1800 |
| Events | |
| Anomaly | Deviation - Procedural Published Material / Policy Deviation - Speed All Types Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Weather / Turbulence |
Narrative:
During a maximum power takeoff on runway 14 in anchorage; we experienced a windshear at approximately 200-400 ft AGL. We performed the windshear recovery procedure; and we issued a PIREP to anc tower. This encounter lasted approximately one minute. After exiting the windshear; we proceeded to clean up the aircraft configuration; and shortly thereafter; entered an area of severe turbulence. We were at approximately 4;000 MSL; and the aircraft was difficult to control. This second encounter last less than one minute. We climbed the aircraft to FL210; and again issued another PIREP. We contacted ATC; the company; and maintenance; and then made the decision to land at the nearest suitable airport. We declared an emergency; and were vectored to dump fuel. We received ATC vectors; and landed runway 14. We experienced a positive airspeed gain of 30 KTS on short final.
Original NASA ASRS Text
Title: MD11 pilot experiences windshear shortly after takeoff from ANC and performs the windshear escape maneuver. At 4;000 FT severe turbulence is encountered resulting in control difficulties. After consultation with the Company; the crew elects to land. On short final a positive airspeed gain of 30 KTS is experienced.
Narrative: During a maximum power takeoff on Runway 14 in Anchorage; we experienced a windshear at approximately 200-400 FT AGL. We performed the windshear recovery procedure; and we issued a PIREP to ANC Tower. This encounter lasted approximately one minute. After exiting the windshear; we proceeded to clean up the aircraft configuration; and shortly thereafter; entered an area of severe turbulence. We were at approximately 4;000 MSL; and the aircraft was difficult to control. This second encounter last less than one minute. We climbed the aircraft to FL210; and again issued another PIREP. We contacted ATC; the Company; and Maintenance; and then made the decision to land at the nearest suitable airport. We declared an emergency; and were vectored to dump fuel. We received ATC vectors; and landed Runway 14. We experienced a positive airspeed gain of 30 KTS on short final.
Data retrieved from NASA's ASRS site as of April 2012 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.