747 APU leak check fire extinguisher
Just wanting to do a quick survey to see if anyone has any information/opinions on what the most suitable type of fire extinguisher for use in APU leak checks on 747.
According to procedures it seems you are meant to be on a workstand beneath the APU with the doors open before you start the APU (negating the aircraft fire protection system) so you can inspect for leaks after filter changes etc.
Our procedures call for a "suitable fire extinguisher" to be at hand. From speaking to various people at my workplace it seems like this issue has never really been addressed.
I'd really appreciate any information with regard to how this check is carried out at other places around the world and what type and size extinguisher you use.
Cheers, Jason