CESSNA 150 PLT RPTR ENCOUNTERS TURB FOLLOWING PIPER AZTEC.

Narrative

FLT OF 3 FROM KENOSHA WISCONSIN TO YIP. 2 CESSNA 152'S AND A PIPER AZTEC. IN CALM AIR AT 105 KTS I EXPERIENCED UNCTLED ROLLS OF L AND R 45 DEGS. ONE OF THE CESSNA 152'S AND THE AZTEC WERE SIDE-BY-SIDE. I WAS BEHIND BOTH SEVERAL HUNDRED YARDS. AFTER DISCUSSING THE INCIDENT WITH THE OTHER PLTS; IT APPEARS THAT I STRAYED INTO THE WAKE OF THE AZTEC; WHICH WAS FLYING QUITE SLOW TO KEEP PACE WITH THE CESSNA 152'S. IN CALM AIR; THE UNEXPECTED ROLLS WERE VERY DISCONCERTING; AS IT HAPPENED 3 TIMES IN A 5 MIN INTERVAL. I HAD CONCERNS ABOUT MECHANICAL PROBS SINCE NEITHER THE OTHER CESSNA 152 OR AZTEC RPTED ANY PROBS. CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: THE RPTR SAID HE HAS BEEN FLYING ABOUT 5 YEARS TO ACCUMULATE HIS 400 HRS. HE IS CURRENTLY WORKING TO ADD AN INST RATING TO HIS PVT LICENSE. HIS FLT INSTRUCTOR WAS IN THE PIPER AZTEC. THE RPTR; THE INSTRUCTOR AND ANOTHER CESSNA 152 PLT HAD PRE-BRIEFED FOR THIS FORMATION FLT OF 3 ACFT. HE WAS AMAZED AT HOW MUCH TURB EVEN THE CESSNA 152 GENERATED AND LEFT IN ITS PATH.