MD11 crew got a series of windshear alerts on rotation at ont.

Attributes
ACN	597985
Time
Date	200310
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ont.airport
State Reference	CA
Altitude	agl bound lower : 10 agl bound upper : 1500
Environment
Weather Elements	Windshear other
Light	Dawn
Aircraft 1
Controlling Facilities	tower : ont.tower
Operator	common carrier : air carrier
Make Model Name	MD-11
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 16000 flight time type : 3000
ASRS Report	597985
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : commercial
Experience	flight time last 90 days : 197 flight time total : 4428 flight time type : 631
ASRS Report	597984
Events
Anomaly	inflight encounter : weather non adherence : company policies
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action flight crew : exited adverse environment
Supplementary
Problem Areas	Flight Crew Human Performance Company Weather
Primary Problem	Weather

Narrative:

On takeoff from ontario, with heavy smoke in area and high winds from fires, upon rotation got tailwind shear alert followed in approximately 5 seconds by headwind shear. Followed windshear alert guidance system flight director and escaped windshear approximately 1500 ft AGL. Filed report with air carrier, but missed the flight operations manual escape maneuver requirement to land at nearest suitable airport. Proceeded to ZZZ airport. Never exceeded engine or airframe parameters during escape maneuver, so no damage was expected. Supplemental information from acn 597984: fires were burning out of control nearby and santa ana. At rotation I heard an audible warning, but could not determine what it was since my attention was focused upon rotating aircraft. Almost immediately I heard another warning. This time I was able to observe an increasing performance windshear alert. We continued the SID, and notified ATC of the windshear alert. After the event, I had been informed that in the emergency procedure section, we were also required to land as soon as possible. Since no emergency was declared, I neglected to refer to this section.

Original NASA ASRS Text

Title: MD11 CREW GOT A SERIES OF WINDSHEAR ALERTS ON ROTATION AT ONT.

Narrative: ON TKOF FROM ONTARIO, WITH HVY SMOKE IN AREA AND HIGH WINDS FROM FIRES, UPON ROTATION GOT TAILWIND SHEAR ALERT FOLLOWED IN APPROX 5 SECONDS BY HEADWIND SHEAR. FOLLOWED WINDSHEAR ALERT GUIDANCE SYS FLT DIRECTOR AND ESCAPED WINDSHEAR APPROX 1500 FT AGL. FILED RPT WITH ACR, BUT MISSED THE FLT OPS MANUAL ESCAPE MANEUVER REQUIREMENT TO LAND AT NEAREST SUITABLE ARPT. PROCEEDED TO ZZZ ARPT. NEVER EXCEEDED ENG OR AIRFRAME PARAMETERS DURING ESCAPE MANEUVER, SO NO DAMAGE WAS EXPECTED. SUPPLEMENTAL INFO FROM ACN 597984: FIRES WERE BURNING OUT OF CTL NEARBY AND SANTA ANA. AT ROTATION I HEARD AN AUDIBLE WARNING, BUT COULD NOT DETERMINE WHAT IT WAS SINCE MY ATTN WAS FOCUSED UPON ROTATING ACFT. ALMOST IMMEDIATELY I HEARD ANOTHER WARNING. THIS TIME I WAS ABLE TO OBSERVE AN INCREASING PERFORMANCE WINDSHEAR ALERT. WE CONTINUED THE SID, AND NOTIFIED ATC OF THE WINDSHEAR ALERT. AFTER THE EVENT, I HAD BEEN INFORMED THAT IN THE EMER PROC SECTION, WE WERE ALSO REQUIRED TO LAND AS SOON AS POSSIBLE. SINCE NO EMER WAS DECLARED, I NEGLECTED TO REFER TO THIS SECTION.

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.