Had a similar problem on one of our 152's this weekend. Answer was found in 2 places. The trim tab on the rudder had been bent out of shape and caused the aircraft to skid through the air. The second problem was loose screws on the instrument panel, the 150/152 left hand side panel is screwed in with all of the instruments, the screws had come loose while it had been sat outside in the bad weather and the vacuum pipes were dislodged causing a small air leak.
For those having a pop at whirly, if an FI was supposed to be the source of all knowledge including engineering where would there be a place for engineers? Genghis would have to take to posting on Pprune all day instead of doing any work..............
