Fire
wow i cant believe you had dry chem in your aircraft, you blust that and its instant white out your now IFR in your cockpit, plus your gagging on the powder.
Halon was banned but is still available for aviation but soon will be no good as well, there is a replacement and its called Halotron, expensive buggers to.
BCF was Banned they brought in Halon now halon is banned and they bring in Halotron, Its all due to the environment, they banned BCF cause of its Hydrocarbins. ohhh got to protect the ozone layer by far the best extinguisher ever.