744 Combi Cargo Fire Extinguishing Query
Hi, folks.
I acquired a set of KLM Combi Engineering Training notes on the internet and I'm trying to make sense of the Cargo Fire Extinguishing system (dull day at the office) :P
The included wiring diagrams are unintelligible (too many dead ends) and they don't match the text in the notes.
Perhaps someone is familiar with this system?
*On the Combi*, does the FWD/AFT Lower Cargo Extinguishing system operate like the regular 744's? i.e. Bottles A & B are discharged immediately, but C&D are discharged after a 30 minute time delay (or when the aircraft lands, whichever is sooner).
On the 14 bottle system (4 bottles located in the Fwd Cargo sidewall and 10 in the Aft Cargo sidewalls)... referred to in the notes as the Extended 90 Minute System:
How many bottles discharge instantly when you ARM and DISCH the Main Deck system? The text seems to say only 4 (A, B, C & D), but the wiring schematics in the training notes show at least 7 bottles discharging instantly. One of the bottles in the diagrams is not even hooked up to the switches! There is a time delay of 8 minutes for the remaining bottles. Does this apply to all the remaining bottles... and does the air/ground system discharge these bottles on touchdown prior to 8 minutes?
Maybe the real AMM or the AOM has a better description?
Thanks for any insight.
Cheers.
NSEU