Term
Frequently, an aircraft’s
auxiliary power
unit (APU) generator
2015 APU |
|
Definition
is identical
to the
engine-driven
generators.
2015 APU |
|
|
Term
Fuel is normally supplied to an APU from
2015 APU |
|
Definition
the airplane’s main fuel supply.
2015 APU |
|
|
Term
An APU is usually rotated during star by
2015 APU |
|
Definition
an electric starter.
2015 APU |
|
|
Term
The
function of an
APU air inlet
plenum is to
2015 APU |
|
Definition
Stabilize the pressure
of the air before it
enters the compressor.
2015 APU |
|
|
Term
When in operation,
the speed of an APU
2015 APU |
|
Definition
Remains
at or near
rated speed
regardless of
the load condition.
2015 APU |
|
|
Term
Generally, when
maximum APU
shaft output power
is being used in
conjunction with
pneumatic power
2015 APU
|
|
Definition
pneumatic loading will
be automatically
modulated to
maintain a safe EGT.
2015 APU |
|
|
Term
When necessary,
APU engine cooling
before shutdown
may be accomplished by
2015 APU |
|
Definition
Closing
the bleed
air valve.
2015 APU |
|
|
Term
Usually, most of the
load placed on
an APU occurs when
2015 APU |
|
Definition
The bleed air valve is opened.
2015 APU |
|
|
Term
Fuel scheduling during
APU start and under
varying pneumatic
bleed and electrical
loads is maintained
2015 APU |
|
Definition
Automatically by
APU fuel
control system.
2015 APU |
|
|
Term
On APU’s equipped with a
free turbine and load
compressor, the primary
function of the load
compressor is to
2015 APU |
|
Definition
provide bleed air for
aircraft pneumatic systems.
2015 APU |
|
|
