This British Standard specifies requirements for portable extinguishers to be used in aircraft additional to the requirements for all portable extinguishers given in BS EN 3 : Part 1 to Part 6. It details the type of extinguishers to be used in aircraft, and requirements for marking and fixing of extinguishers in aircraft.
BS 7867:1997 history
1997BS 7867:1997 Specification for portable fire extinguishers for use in aircraft