Auxiliary Power Unit (Apu); General; Major Sections - BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual

AUXILIARY POWER
UNIT (APU)

GENERAL

The APU (Figure 6-1) is mounted on a skid
support assembly enclosed in a fireproof metal
container in the aft equipment bay.

MAJOR SECTIONS

The APU (Figure 6-2) can be divided into six
major sections as follows:
1. Air intake
2. Compressor
3. Combustor
6-2 CL 601-3A/R
CL-600-2B16 PILOT TRAINING MANUAL
Air Intake
The main air inlet to the compressor is located
around the waist of the APU. The air intake is
shrouded and connected by a rectangular duct
to a flush screened inlet (figure 6-3) at the top
of the rear fuselage compartment.
Compressor
The compressor is a single-stage centrifugal
type, which induces air through the intake,
compresses the air, and directs the airflow for
cooling, combustion, and bleed air extraction.
Figure 6-1. APU Installation
FOR TRAINING PURPOSES ONLY
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4. Turbine
5. Exhaust
6. Accessory Gear
L t é e
L t d .