Widebody transport flight encounters wind shear. Map executed.

Attributes
ACN	284721
Time
Date	199410
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mco
State Reference	FL
Altitude	msl bound lower : 400 msl bound upper : 1500
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tower : mco
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach landing : missed approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 11000 flight time type : 5000
ASRS Report	284721
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : atp
Events
Anomaly	inflight encounter : weather
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	other

Narrative:

WX at kmco was scattered with good visibility but I could see rain showers in the area -- scattered. On final to runway 17 I could see a rain shower between us and the runway moving west to east. Switched to tower to check on winds and they were 270/16. About 3 mi out went into rain, which was heavy, but not much turbulence and airspeed held steady at 160 KTS. (Reference plus 20) and first officer was having no problems staying on ILS. At about 400 ft AGL airspeed jumped to 180. I called for go around and we executed it maximum performance style. Broke out of shower at south end of runway. Flew another pattern and landed VFR no trouble as rain had moved east, but wind stayed from west at 30 KTS. Previous wind shear training enabled me to notice an increasing performance wind shear (or what may have been one) and execute a safe evasive maneuver.

Original NASA ASRS Text

Title: WDB FLT ENCOUNTERS WIND SHEAR. MAP EXECUTED.

Narrative: WX AT KMCO WAS SCATTERED WITH GOOD VISIBILITY BUT I COULD SEE RAIN SHOWERS IN THE AREA -- SCATTERED. ON FINAL TO RWY 17 I COULD SEE A RAIN SHOWER BTWN US AND THE RWY MOVING W TO E. SWITCHED TO TWR TO CHK ON WINDS AND THEY WERE 270/16. ABOUT 3 MI OUT WENT INTO RAIN, WHICH WAS HVY, BUT NOT MUCH TURB AND AIRSPD HELD STEADY AT 160 KTS. (REF PLUS 20) AND FO WAS HAVING NO PROBS STAYING ON ILS. AT ABOUT 400 FT AGL AIRSPD JUMPED TO 180. I CALLED FOR GAR AND WE EXECUTED IT MAX PERFORMANCE STYLE. BROKE OUT OF SHOWER AT S END OF RWY. FLEW ANOTHER PATTERN AND LANDED VFR NO TROUBLE AS RAIN HAD MOVED E, BUT WIND STAYED FROM W AT 30 KTS. PREVIOUS WIND SHEAR TRAINING ENABLED ME TO NOTICE AN INCREASING PERFORMANCE WIND SHEAR (OR WHAT MAY HAVE BEEN ONE) AND EXECUTE A SAFE EVASIVE MANEUVER.

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.