Beechcraft Duchess 76 - Instrument Air Filter

BEECHCRAFT
Duchess 76
section VIII
Handling, Serv and Maint
2. Remove the screws which secure the filter to the inlet
and outlet ducts.
3. Remove the filter from the airplane.
NOTE
When reinstalling the induction air filter, observe
the direction of the air flow
as marked on the
filter.
4. Position the filter and install the screws to secure the
filter to the inlet and outlet ducts.
5. Install the upper engine cowling.
INSTRUMENT
AIR FILTER
A central filter for the instrument air system is a disposable
unit and must
be discarded and replaced at 300 to 500 hour
intervals,
or more often if conditions warrant.
1. Remove the nose compartment access panel and ac-
cess plates
on the nose compartment floor to gain access to
the filter located below the floor
on the left side, forward of the
cabin bulkhead.
2. Remove the clamps at the inlet and outlet of the filter.
3. Remove tl!e filter from the airplane.
4. Position the new filter (note direction of air flow), install
the inlet and outlet hoses, and secure
in place with clamps at
the inlet and outlet of the filter.
5. Install access plates on the nose compartment floor and
nose compartment access panel.
January 1978 8-21