Change of emphasis, perhaps, but I saw a 150 go into Moreby harbour probable cause carby ice on a hot png day. Humid tho. He was beating up boats along the reef on reduced power to get good looks at crews, when he opened the throttle the response was noted by absence. Trying to climb was the last mistake, he wallowed up to about 200', stall, spin, splash. Of course you can't get ice at 90+, can you?