15.19 powerplant installation Flashcards
what is a fire wall
a partition between the engine powerplant installation and the aircraft
what classifies a zone as a fire zone
compartments that contain ignition sources and the potential for flammable fluid leakage
Helicopters utilise the firewalls to ensure
the engine is separated from the adjacent engine or the main gearbox section.
what are cowling designed to do
route cooling air effectively around the engine and its components.
what is the cowling attached to
the nacelle support frame
what are thrust reverser cowling commonly referred to as
the ‘C’ duct
The ‘C’ duct can be easily opened for maintenance using what
a hand-operated hydraulic pump or an electric pump
what is One method of suppressing the noise from the fan stage of a high by-pass ratio engine
by using a noise-absorbent liners around the inside wall of the bypass duct
what is the disadvantage of using acoustic liners to reduce noise
weight
where are the pylon-mounted engines connected to
the pylon by front and rear brackets
where are the actual mounting points on an engine located
at the front, on the compressor casing and at the rear on the exhaust/turbine casing
what loads do the forward engine mounts carry
side, and axial (thrust) loads
The main mounting bolt/trunnion assemblies often have spherical bearings, what does this allow
expansion and torque
what is The minimum radii for bends in wire groups or bundles
10 times the outside diameter of their largest wire
what is the main components of a drain system
The drain lines which collect the fluids
Module assembly where all the drain lines end
what is used to raise and lower the engine into position
the dedicated lifting points only
