 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Air carrier captain reported using firewall thrust to cope with an unexpected tailwind shear event during takeoff from bos.
| Attributes | |
| ACN | 1420307 |
| Time | |
| Date | 201701 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | BOS.Airport |
| State Reference | MA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Widebody Low Wing 3 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Route In Use | SID HYLND4 |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Inflight Event / Encounter Weather / Turbulence |
Narrative:
Boston was departing on runway 22R; winds were reported 260 at 13 kts with no gusts or windshear forecast. We planned a max power takeoff for departure on the HYLND4. At rotation; prior to establishing a positive rate of climb; the airspeed stagnated and the wags system sounded an aural tailwind shear alert and the flight director switched to wind shear guidance. Due to poor acceleration and climb performance; I advanced the throttles towards firewall power and we climbed out in takeoff configuration. The pilot monitoring notified boston tower of the windshear; and after windshear guidance was exited; tower and departure provided vectors to hylnd; the final point of the SID. The power setting was reduced to max at about 1000 ft AGL and no exceedances were observed. With no evidence of damage or exceedances the flight was continued.aircraft systems operated normally; windshear escape procedures were followed. Simulator training is very valuable in developing the reflexes for unexpected events such as low level wind shear.
Original NASA ASRS Text
Title: Air carrier Captain reported using firewall thrust to cope with an unexpected tailwind shear event during takeoff from BOS.
Narrative: Boston was departing on Runway 22R; winds were reported 260 at 13 kts with no gusts or windshear forecast. We planned a max power takeoff for departure on the HYLND4. At rotation; prior to establishing a positive rate of climb; the airspeed stagnated and the WAGS system sounded an aural Tailwind Shear alert and the flight director switched to wind shear guidance. Due to poor acceleration and climb performance; I advanced the throttles towards Firewall Power and we climbed out in takeoff configuration. The pilot monitoring notified Boston Tower of the windshear; and after windshear guidance was exited; Tower and departure provided vectors to HYLND; the final point of the SID. The power setting was reduced to max at about 1000 ft AGL and no exceedances were observed. With no evidence of damage or exceedances the flight was continued.Aircraft systems operated normally; windshear escape procedures were followed. Simulator training is very valuable in developing the reflexes for unexpected events such as low level wind shear.
Data retrieved from NASA's ASRS site 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.