http://www.aph.gov.au/hansard/senate...tee/s-rrat.htm
2/11/99- p 54-
" the source of the odours has been identified as predominantly Mobil
Jet Oil 2 leaking past oil seals in the engines and/or auxiliary power
unit into the air conditioning system"
Submission 11- Volume 1- summary-
" Reports of cabin odours have been received from time to time and have
predominantly been determined to be due to minor systems failures such
as leaks from oil seals ....."