Narrative:

From a right base we were cleared a visual approach to runway 26R at ontario, ca. Through the turn I noticed a widebody transport on final ahead of us. I asked the tower the widebody transport's distance, and he responded the distance was 3.5 mi, but he is landing on the other runway 26L. I requested the winds as we continued the turn. The winds were given as 270 degree/15 KTS. I checked the airport page for runway separation distance and it seemed they were pretty close. Shortly after rolling wings level on final for 26R, we got an uncommanded left wing down roll of approximately 30 degree at 1000 ft AGL. I immediately took control of the aircraft and executed a go around. Following the go around we flew an uneventful visual approach and landing on 26L.

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Original NASA ASRS Text

Title: WAKE TURB ENCOUNTER CAUSES ACR MLG PIC TO TAKE OVER CTLS AND EXECUTE AN EVASIVE ACTION GAR.

Narrative: FROM A R BASE WE WERE CLRED A VISUAL APCH TO RWY 26R AT ONTARIO, CA. THROUGH THE TURN I NOTICED A WDB ON FINAL AHEAD OF US. I ASKED THE TWR THE WDB'S DISTANCE, AND HE RESPONDED THE DISTANCE WAS 3.5 MI, BUT HE IS LNDG ON THE OTHER RWY 26L. I REQUESTED THE WINDS AS WE CONTINUED THE TURN. THE WINDS WERE GIVEN AS 270 DEG/15 KTS. I CHKED THE ARPT PAGE FOR RWY SEPARATION DISTANCE AND IT SEEMED THEY WERE PRETTY CLOSE. SHORTLY AFTER ROLLING WINGS LEVEL ON FINAL FOR 26R, WE GOT AN UNCOMMANDED L WING DOWN ROLL OF APPROX 30 DEG AT 1000 FT AGL. I IMMEDIATELY TOOK CTL OF THE ACFT AND EXECUTED A GAR. FOLLOWING THE GAR WE FLEW AN UNEVENTFUL VISUAL APCH AND LNDG ON 26L.

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.