Few A320 questions
Firstly this might seem very stupid but can anyone explain the meaning OF HOW the following are said (taken from A320 Checklist), I know the C= Captain, FO=First Officer but WHO says WHAT in this kind of scenario?
Say the Captain is PF, and FO is PM.
RCDR GND CTL............[C]............ON
DOORS/SLIDES............VERIFY..........CLOSED/ARMED
BEACON..............[FO].............ON
Secondly in the Avionics Compartment, what exactly is the skin heat exchanger? What is the purpose of it when you have the Blower Fan drawing air in, and the extract fan dumping it overboard?
Lastly, I'm aware the AC Packs supply air that enters a mixing unit, then air is delivered to the trim air valves for entry into the cabin, but where does the AIR CYCLE MACHINE come into this?
Many thanks for your help,
s744