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Medium large transport has windshear equipment on board. Received alert and noticed loss of airspeed below approach speed. Maximum power applied, go around.
| Attributes | |
| ACN | 216140 |
| Time | |
| Date | 199206 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : iah |
| State Reference | TX |
| Altitude | msl bound lower : 500 msl bound upper : 1000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : iah |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach landing : go around |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 10000 flight time type : 7000 |
| ASRS Report | 216140 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | inflight encounter : weather non adherence : published procedure other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : exited adverse environment other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
We experienced a 30-40 KT shear in a medium large transport which was equipped with the wind shear GPWS. At approximately 500 ft the captain was hand flying an ILS in heavy rain when the GPWS warned of windshear and I noticed an immediate loss of 15 KT below approach speed. The captain applied maximum power in what I thought was a go around maneuver. However after applying the power to the forward stops, he jerked both throttles to idle thrust and tried to reintercept the approach. I again noticed an immediate drop of 15 KTS of airspeed and said go around very loudly. We went around. The captain now says he had justification to continue because he had recovered from the windshear. Obviously he didn't understand that we could have been flying into a steadily increasing shear. Please insure that the procedure for exit from a windshear is called an escape maneuver and not a recovery procedure.
Original NASA ASRS Text
Title: MLG HAS WINDSHEAR EQUIP ON BOARD. RECEIVED ALERT AND NOTICED LOSS OF AIRSPD BELOW APCH SPD. MAX PWR APPLIED, GAR.
Narrative: WE EXPERIENCED A 30-40 KT SHEAR IN A MLG WHICH WAS EQUIPPED WITH THE WIND SHEAR GPWS. AT APPROX 500 FT THE CAPT WAS HAND FLYING AN ILS IN HVY RAIN WHEN THE GPWS WARNED OF WINDSHEAR AND I NOTICED AN IMMEDIATE LOSS OF 15 KT BELOW APCH SPD. THE CAPT APPLIED MAX PWR IN WHAT I THOUGHT WAS A GAR MANEUVER. HOWEVER AFTER APPLYING THE PWR TO THE FORWARD STOPS, HE JERKED BOTH THROTTLES TO IDLE THRUST AND TRIED TO REINTERCEPT THE APCH. I AGAIN NOTICED AN IMMEDIATE DROP OF 15 KTS OF AIRSPD AND SAID GAR VERY LOUDLY. WE WENT AROUND. THE CAPT NOW SAYS HE HAD JUSTIFICATION TO CONTINUE BECAUSE HE HAD RECOVERED FROM THE WINDSHEAR. OBVIOUSLY HE DIDN'T UNDERSTAND THAT WE COULD HAVE BEEN FLYING INTO A STEADILY INCREASING SHEAR. PLEASE INSURE THAT THE PROC FOR EXIT FROM A WINDSHEAR IS CALLED AN ESCAPE MANEUVER AND NOT A RECOVERY PROC.
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.