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Captain of an large transport air carrier aircraft lost control momentarily of the aircraft during an ILS approach in IMC due to wind shear.
| Attributes | |
| ACN | 253990 |
| Time | |
| Date | 199310 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : mia |
| State Reference | FL |
| Altitude | msl bound lower : 1500 msl bound upper : 1600 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mia |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent : approach landing : go around |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 225 flight time total : 15000 flight time type : 2283 |
| ASRS Report | 253990 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 225 flight time total : 6000 flight time type : 640 |
| ASRS Report | 253991 |
| Events | |
| Anomaly | inflight encounter : weather other anomaly other anomaly other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : exited adverse environment flight crew : regained aircraft control other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | other |
Narrative:
Wind shear encounter. During ILS approach to runway 27L mia, wind shear encountered. Aircraft was fully configured, on localizer and GS at 1500-1600 MSL, 150 KIAS when 1500-2000 FPM sink rate developed, accompanied by 20-25 KT loss of airspeed. Power increase to 5500 pounds per hour fuel flow and slight pitch increase had no apparent effect on sink rate or airspeed. Firewall power applied and pitch attitude was decreased to recover airspeed. Upon reaching 140-150 KIAS pitch attitude was maintained at 13-15 degrees nose up. Aircraft slowly climbed to 2800 MSL. Cleanup to flaps 2 degrees was completed when second wind shear occurred. Loss of 200- 300 ft encountered. Go around power applied and aircraft recovered. During this second wind shear event, airspeed reached 270 KIAS with leading edge devices extended. Aircraft slowed below limit speed. Cleaned up and diverted to fll for uneventful landing.
Original NASA ASRS Text
Title: CAPT OF AN LGT ACR ACFT LOST CTL MOMENTARILY OF THE ACFT DURING AN ILS APCH IN IMC DUE TO WIND SHEAR.
Narrative: WIND SHEAR ENCOUNTER. DURING ILS APCH TO RWY 27L MIA, WIND SHEAR ENCOUNTERED. ACFT WAS FULLY CONFIGURED, ON LOC AND GS AT 1500-1600 MSL, 150 KIAS WHEN 1500-2000 FPM SINK RATE DEVELOPED, ACCOMPANIED BY 20-25 KT LOSS OF AIRSPD. PWR INCREASE TO 5500 LBS PER HR FUEL FLOW AND SLIGHT PITCH INCREASE HAD NO APPARENT EFFECT ON SINK RATE OR AIRSPD. FIREWALL PWR APPLIED AND PITCH ATTITUDE WAS DECREASED TO RECOVER AIRSPD. UPON REACHING 140-150 KIAS PITCH ATTITUDE WAS MAINTAINED AT 13-15 DEGS NOSE UP. ACFT SLOWLY CLBED TO 2800 MSL. CLEANUP TO FLAPS 2 DEGS WAS COMPLETED WHEN SECOND WIND SHEAR OCCURRED. LOSS OF 200- 300 FT ENCOUNTERED. GAR PWR APPLIED AND ACFT RECOVERED. DURING THIS SECOND WIND SHEAR EVENT, AIRSPD REACHED 270 KIAS WITH LEADING EDGE DEVICES EXTENDED. ACFT SLOWED BELOW LIMIT SPD. CLEANED UP AND DIVERTED TO FLL FOR UNEVENTFUL LNDG.
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.