A B727-200 encountered forecast windshear on 2 approachs to slc and executed missed approachs with T...

Attributes
ACN	426444
Time
Date	199901
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : slc
State Reference	UT
Altitude	msl bound lower : 5227 msl bound upper : 6500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727-200
Flight Phase	other
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 180 flight time total : 20000 flight time type : 7000
ASRS Report	426444
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
Events
Anomaly	inflight encounter : weather other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

On approach to slc, notified that an aircraft had gone around for windshear, but others had landed. Initiated approach and noted that winds had gone from 180 degrees 25 KTS gusting to 35 KTS, to 360 degrees 25 KTS gusting to 35 KTS. Got a 20 KT increase at about 1200 ft AGL and went around. Also got TCASII windshear warning. Went to fairfield to hold and was told other aircraft had landed. Initiated another approach and again got increase of +20 KTS at approximately 1000 ft AGL. Also got windshear warning. Then on that go around at approximately 2500 ft AGL, got another TCASII warning and aircraft shuddered and lost airspeed and some altitude (not sure how much). Full firewall power applied. Diverted to las. When winds change direction and are at stray, this creates unstable area. Better measuring instruments might have picked up the windshear. Supplemental information from acn 426752: while cleaning up and accelerating through 6500 ft MSL, got a hugh airspeed loss and windshear annunciation. This time with firewall thrust. En route, contacted dispatcher and maintenance. Are reluctant to try again at slc due to possible overboost of engines. Due to tankered fuel, are fat on gas. Jointly agree to divert to las due to forecast WX and maintenance capability. Advised engines #2 and #3 were overboosted requiring an engine change. Also advised to submit NASA form for cya.

Original NASA ASRS Text

Title: A B727-200 ENCOUNTERED FORECAST WINDSHEAR ON 2 APCHS TO SLC AND EXECUTED MISSED APCHS WITH TCASII WARNING. DURING THE SECOND WINDSHEAR AVOIDANCE MANEUVER, THE ACFT EXPERIENCED SEVERE WINDSHEAR WHICH REQUIRED ENOUGH THRUST TO OVERBOOST ENGS #2 AND #3.

Narrative: ON APCH TO SLC, NOTIFIED THAT AN ACFT HAD GONE AROUND FOR WINDSHEAR, BUT OTHERS HAD LANDED. INITIATED APCH AND NOTED THAT WINDS HAD GONE FROM 180 DEGS 25 KTS GUSTING TO 35 KTS, TO 360 DEGS 25 KTS GUSTING TO 35 KTS. GOT A 20 KT INCREASE AT ABOUT 1200 FT AGL AND WENT AROUND. ALSO GOT TCASII WINDSHEAR WARNING. WENT TO FAIRFIELD TO HOLD AND WAS TOLD OTHER ACFT HAD LANDED. INITIATED ANOTHER APCH AND AGAIN GOT INCREASE OF +20 KTS AT APPROX 1000 FT AGL. ALSO GOT WINDSHEAR WARNING. THEN ON THAT GAR AT APPROX 2500 FT AGL, GOT ANOTHER TCASII WARNING AND ACFT SHUDDERED AND LOST AIRSPD AND SOME ALT (NOT SURE HOW MUCH). FULL FIREWALL PWR APPLIED. DIVERTED TO LAS. WHEN WINDS CHANGE DIRECTION AND ARE AT STRAY, THIS CREATES UNSTABLE AREA. BETTER MEASURING INSTS MIGHT HAVE PICKED UP THE WINDSHEAR. SUPPLEMENTAL INFO FROM ACN 426752: WHILE CLEANING UP AND ACCELERATING THROUGH 6500 FT MSL, GOT A HUGH AIRSPD LOSS AND WINDSHEAR ANNUNCIATION. THIS TIME WITH FIREWALL THRUST. ENRTE, CONTACTED DISPATCHER AND MAINT. ARE RELUCTANT TO TRY AGAIN AT SLC DUE TO POSSIBLE OVERBOOST OF ENGS. DUE TO TANKERED FUEL, ARE FAT ON GAS. JOINTLY AGREE TO DIVERT TO LAS DUE TO FORECAST WX AND MAINT CAPABILITY. ADVISED ENGS #2 AND #3 WERE OVERBOOSTED REQUIRING AN ENG CHANGE. ALSO ADVISED TO SUBMIT NASA FORM FOR CYA.

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.

A B727-200 encountered forecast windshear on 2 approachs to slc and executed missed approachs with TCASII warning. During the second windshear avoidance maneuver, the aircraft experienced severe windshear which required enough thrust to overboost engines #2 and #3.