Narrative:

Air carrier Y MD80 was descended visually in front of air carrier X en route to lga on minks arrival. Aircraft were approximately 4 mi apart at this point with speeds applied. Approximately 3 mins later, lateral separation had increased to 7 mi when air carrier X asked if it was an MD80 he was following. I confirmed the type. Air carrier X advised he experienced a 45 degree wake turbulence roll. The pilot/crew of air carrier X said it was the third time this day he experienced a wake turbulence roll of severe nature following an MD80. He said it may be due to the structure of the D328. I question the pilot if the wind was calm at the altitude of the occurrence (15000 MSL). He reported a 15 KT quartering tailwind was what he recalled. The aircraft continued descent to 11000 ft via arrival with no further comment.

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Original NASA ASRS Text

Title: FLC OF A DORNIER 328 MOMENTARILY LOST LATERAL CTL AFTER ENCOUNTERING WAKE TURB FROM AN MD80 AHEAD ON A STAR ARR AT 15000 FT.

Narrative: ACR Y MD80 WAS DSNDED VISUALLY IN FRONT OF ACR X ENRTE TO LGA ON MINKS ARR. ACFT WERE APPROX 4 MI APART AT THIS POINT WITH SPDS APPLIED. APPROX 3 MINS LATER, LATERAL SEPARATION HAD INCREASED TO 7 MI WHEN ACR X ASKED IF IT WAS AN MD80 HE WAS FOLLOWING. I CONFIRMED THE TYPE. ACR X ADVISED HE EXPERIENCED A 45 DEG WAKE TURB ROLL. THE PLT/CREW OF ACR X SAID IT WAS THE THIRD TIME THIS DAY HE EXPERIENCED A WAKE TURB ROLL OF SEVERE NATURE FOLLOWING AN MD80. HE SAID IT MAY BE DUE TO THE STRUCTURE OF THE D328. I QUESTION THE PLT IF THE WIND WAS CALM AT THE ALT OF THE OCCURRENCE (15000 MSL). HE RPTED A 15 KT QUARTERING TAILWIND WAS WHAT HE RECALLED. THE ACFT CONTINUED DSCNT TO 11000 FT VIA ARR WITH NO FURTHER COMMENT.

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.