The picture I posted is from Polish Navy Mi-14PS (#1016) - SAR version similar to the one that crashed (manufactured in 1983). There are no inflatable seals around doors. It is probable there is positive pressure inside the avionics (radar) compartment, but no inflatable seals there as well. Although our ASW Mi-14PLs do have a seal around the door, but I have no klowledge if it is in fact inflatable (didn't looked that way).