In Australia the aircraft which caused the highest number of fume problems was The Bae 146, it's Lycoming ALF 502 engines and Garrett 150M APU were both know to have compressor stage oil seal problems….I think the same APU was fitted on the B757 & G IV as well…..as a former 146 pilot I often encountered many fumes events and know of former colleagues who were forced to stop flying because of their own adverse reactions to the fumes (TCP).