the lavatory call system of aircraft is a system in which any passenger using aircraft lavatory is in need of any help from any cabin crew may ask help by pressing a call button inside the lavatory and draw attention of cabin crew that some one is needing help in one of the lavatories.
You call someone who drops from an aircraft by parachute a skydiver.A skydiver, parachuter, or parachutist.
They are called aircraft passengers. What else do you think?
engine
fleet
a boarder
A Hangar
Pilot.
The engines.
CSAS is an acronym for Command Stability Augumentation System - The "Fly by wire" system on Tornado Aircraft.
A flight, or squadron, or wing.
glider
aircraft