Airwork has 11 x737-400 and 3 x737-300 working in the Australia/New Zealand network. All the 400's have the AEI cargo door conversion (Aircraft Engineers Inc of Dothan Alabama). Of the 300's one has the AEI door and the remaining two have the IAI (Israel Aircraft Industries) cargo door conversion. With Boeing withdrawing EDTO approval the individual conversion companies are now completing the approval process directly with the FAA. It is only a paperwork exercise and a temporary hiccup.