Raytheon Beechraft Starship 2000, Руководство по обслуживанию

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21-30-00
STARSHIP 1 MAINTENANCE MANUAL
Page 28
Oct 31/06
B10
OUTFLOW VALVE SERVICING
Fluctuation of cabin pressure often indicates a dirty poppet or seat in one or both of the outflow valves. The seats
and poppets should be cleaned at the intervals specified in Chapter 12 or as necessary to allow for proper system
operation.
a. Refer to OUTFLOW VALVE REMOVAL in this chapter and remove the outflow valves from the airplane.
b. Inspect the each outflow valve poppet, seat and noise suppression screen for accumulation of dust and tobacco
smoke residue.
c. Using a suitable liquid dispenser filled with a mild liquid detergent and water, or with alcohol (1, Chart 1, 21-00-
00), flush the valve poppets, seats and noise suppression screens. It may be necessary to remove the noise
suppression screens and wipe the poppets and seats with a clean rag dampened with a mild liquid detergent or
alcohol (1, Chart 1, 21-00-00).
CAUTION: Use only the products listed. Unapproved products may have a damaging effect on the components of
the valve or may leave a residue which will interfere with the valve action.
d. Refer to OUTFLOW VALVE INSTALLATION in this chapter and install the outflow valves.
CABIN PRESSURIZATION CONTROLLER FILTER CLEANING
The cabin pressurization controller filter should be cleaned anytime an excess of dust or tobacco residue is evident.
This condition may be indicated by erratic operation of the cabin pressurization controller.
a. Refer to CABIN PRESSURIZATION CONTROLLER REMOVAL in this chapter and remove the cabin
pressurization controller from the instrument panel.
b. Remove the screen and filter element from the cabin pressurization controller housing.
c. Wash the screen and filter element in solvent (4, Chart 1, 21-00-00). Dry the parts by blowing compressed air
across their surfaces.
d. Ensure that the orifice in the controller housing is free of foreign material.
CAUTION: Use care not to damage the orifice in the housing. Proper system operation is dependant on the size of
the orifice.
e. Install the filter element and screen in the cabin pressurization controller housing.
f. Refer to CABIN PRESSURIZATION CONTROLLER INSTALLATION in this chapter and install the cabin
pressurization controller in the instrument panel.