Thx for the links cd. I did a search in the on-line NFPA codes for 'aircraft' and came up empty other than aircraft hangers. Given the broad range of things NFPA covers I found that odd. I checked with Kidde and they informed me that only 1211 is acceptable as an aircraft extinguishing agent and that you had to be IMO certified to deal with Halon in these circumstances.
Regards
d