Diamond DA 42 NG, Maintenance Manual

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AIRCRAFT
Power Plant DA 42 NG AMM
Page 4
15 Mar 2018
71-60-00
Doc # 7.02.15
Rev. 4
2. Description
The air intake has 4 main parts:
)
Alternate air valve assembly.
)
Air filter housing.
)
Air filter.
)
Alternate air valve operating cables.
A. Alternate Air Assembly
Refer to Figure 1. The alternate air valve is attached to the right hand face of the air filter box. The
air filter attaches to the front of the alternate air valve. The alternate air valve also has an inlet direct
from the engine compartment. Rotary motion of the outer ring opens different holes to the engine
compartment. Thus the valve can select either fresh filtered air or warm unfiltered air which passes
through a fine foreign object damage (FOD) screen. Refer to Figure 2.
B. Air Filter Housing
The air filter housing is made of sheet aluminum. It has a flexible hose which connects the housing
to the air intake duct. Bolts attach the air filter housing to brackets on the engine mount.
C. Air Filter
Refer to Figure 1. The air filter is a K&N RU-1620 high-flow air filter. The air filter located on the air
filter housing, on the right of the engine compartment, just forward of the firewall. It is held to the
forward face of the alternate air valve by a worm-drive clamp.
D. Alternate Air Valve Operating Cables
A control lever on the right side of the center console, below the instrument panel operates the
alternate air valves.
If MÄM 42-933 is NOT installed:
Bowden cable connects the control lever to a relay lever. The relay lever is mounted in the relay
bracket which is located on the cockpit control bulkhead, below the pilot’s seat. Two more Bowden
cables connect the relay lever to the left and right engine alternate air valve operating levers.