Hi,
4) Is it true the engine fire extinguisher does NOT reach the gearbox?
I think it is not true (just a guess). If the engine fire extinguisher does not reach the gearbox, why there are 4 overheat and fire detectors in the fan case (the gearbox is installed on the fan case)?
In addition the engine fire extinguisher ports are at the top, therefore the fire extinguisher will reach the gearbox (on the side of the fan case) which is no that far from the fire extinguisher ports. The fan cowls (when closed) will facilitate the fire extinction because they can keep or hold the fire extinguisher around the fan case. During engine run-up with fan cowls open, the presence of a ground fire extinguisher is required and necessary.
The gearbox contains oil and many accessories are installed on it: EDP, IDG fuel pump & HMU..... These components and their hoses still contain fuel, hydraulic, and oil which are flamable even tough the engine fire switch is pulled.
I have some questions regarding engine and APU fire:
-If there is one engine fire on trijet or quadjet, is the fire considered as emergency and the pilot must land ASAP?
-Is the APU fire considered as emergency, assuming the APU was operating at flight (for some raisons)?(on a twin, tri, or quad).
Feedback appreciated. Thank you.
Best regards.