Airplane Maintenance Manual
Bristell
B23-915
Chapter 72
supplement
Chapter 72 Page 12
Issue: 09.12.2021
72-20
Air Inlet Section
Engine air inlet system ensures supply of sufficient air volume to the
engine. Air is supplied to the engine through the RHS NACA inlet on the
lower cowling leading to the Air filter box (1), in which the air filter (2)
is installed. From here the air is routed to the turbocharger (5), where
it is compressed. An alternate air flap (3), in case of obstructed air filter,
is controlled by a Bowden cable leading to the ALT AIR knob (4) in the
cockpit compartment. The compressed (and heated) air is chilled in the
intercooler (7), to which air from the central upper NACA inlet in the
upper cowling is lead through a duct (8). The engine air rate to the
manifold air box (10) is controlled via the throttle control.
Fig. 4
Removal/Installation of Air Intake System
Item
Description
Item Description
1
Air filter box (primary air inlet)
2
Air filter element
3
Alternate air (flap)
4
Alternate air control
5
Turbocharger
6
Intercooler air inlet hose (warm)
7
–
Intercooler (71B550050N)
8
Cooling air inlet duct
9
Intercooler air outlet hose (cold)
10
Airbox
