Replacement for Halon fire extinguishant

Date:         09 May 97 03:29:02 
From:         GWilson404@aol.com
Followups:    1
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Can anyone update me with the latest status of an approved alternative to
Halon for engine fire extinguishers? e.g. is there a planned date for an
FAA approval?

I have heard of experimental programs on 777 and F18. Can anyone give me
details of status and extinguishant type?

TIA

Gerald Wilson