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Captain of an airbus A320 exceeded the aircraft flap speed limitation during approach due to entering a windshear condition.
| Attributes | |
| ACN | 449823 |
| Time | |
| Date | 199909 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : bos.airport |
| State Reference | MA |
| Altitude | msl single value : 2500 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : a90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 4r other |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 215 flight time total : 11000 flight time type : 2385 |
| ASRS Report | 449823 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 6200 flight time type : 500 |
| ASRS Report | 449261 |
| Events | |
| Anomaly | inflight encounter other non adherence other other anomaly |
| Independent Detector | aircraft equipment other aircraft equipment : air speed indicator other flight crewa other flight crewb |
| Resolutory Action | flight crew : regained aircraft control none taken : unable other |
| Consequence | other |
| Supplementary | |
| Problem Areas | Weather Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Airbus A320, at GS intercept, went to flaps 3 degrees. A sudden wind gust caused the aircraft to accelerate rapidly and faster than the autoplt or autothrottles could respond -- and despite disengaging the autoplt. Raising the pitch and retarding the throttles to idle. We continued to increase speed to the point that flaps 3 degree limit speed was exceeded by 304 KTS for 2-3 seconds. There was no corresponding windshear-like decrease in airspeed. The flight continued to a normal landing. ATIS winds were 050 degrees at 15 KTS gusting to 24 KTS. This incident was inadvertent. Follow-up with maintenance indicated no aircraft damage. I feel that our training is adequate to cover most sits like this.
Original NASA ASRS Text
Title: CAPT OF AN AIRBUS A320 EXCEEDED THE ACFT FLAP SPD LIMITATION DURING APCH DUE TO ENTERING A WINDSHEAR CONDITION.
Narrative: AIRBUS A320, AT GS INTERCEPT, WENT TO FLAPS 3 DEGS. A SUDDEN WIND GUST CAUSED THE ACFT TO ACCELERATE RAPIDLY AND FASTER THAN THE AUTOPLT OR AUTOTHROTTLES COULD RESPOND -- AND DESPITE DISENGAGING THE AUTOPLT. RAISING THE PITCH AND RETARDING THE THROTTLES TO IDLE. WE CONTINUED TO INCREASE SPD TO THE POINT THAT FLAPS 3 DEG LIMIT SPD WAS EXCEEDED BY 304 KTS FOR 2-3 SECONDS. THERE WAS NO CORRESPONDING WINDSHEAR-LIKE DECREASE IN AIRSPD. THE FLT CONTINUED TO A NORMAL LNDG. ATIS WINDS WERE 050 DEGS AT 15 KTS GUSTING TO 24 KTS. THIS INCIDENT WAS INADVERTENT. FOLLOW-UP WITH MAINT INDICATED NO ACFT DAMAGE. I FEEL THAT OUR TRAINING IS ADEQUATE TO COVER MOST SITS LIKE THIS.
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.