Not being able to get my hands on a Dangerous Goods manual, as far as I am aware ICAO rules state that time-expired chemical oxygen generators are prohibited from carriage and MUST be transported by surface means, as a direct result of the ValuJet disaster. However, if they were new and being transported for fitment to aircraft at base then perhaps it is allowed as long as they were packaged in the permitted containers and amounts specified by ICAO. Possibly they can be carried in cargo-only aircraft. I stress I'm not sure as I do not have the manual to hand.
Last edited by Smudger; 17th Oct 2012 at 17:21.