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Falcon Spring 2005
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Water separator illustration.
Falcon 900/EX/EX EASy Water Separator Maintenance
— Ron Grose
During the A+ inspection of these aircraft, the LP water separator (part number B31WA3021, 3022 or 3023) is removed for inspection and cleaning/ replacement of the coalescer sock (per work cards 21-505 and/or 21-508). During this inspection, the pressure relief valve located inside the water separator should be inspected for freedom of movement and the air vanes (vortex) should also be inspected for damage such as bent or twisted vanes using a mirror and light.
If air vane damage is found, this indicates a problem with the turbine anti-icing valve (44HN), temperature sensor (43HN) or the amplifier (42HN) which controls the valve. The system can be checked very easily by applying cold or hot air to the temperature sensor and verifying the anti-icing valve is operating properly.
If the anti-icing system is operating properly, damaged vanes could indicate that the flight crew is operating the temperature control system at the extreme “cold” selection of the temperature control unit. This causes icing of the pressure relief valve and coalescer sock, which then leads to excessive pressures inside the separator unit and bending of the vanes. When the vanes are damaged, the air conditioning system will not cool efficiently.
The system operating normally on a warm day is indicated by an abundant flow of water from the water separator located in the tail of the aircraft.
Nose Gear Turning Collars
— Mark Goertzen
Nose gear turning collar illustration.
While walking by your F50/EX, 900/EX or 2000/EX, check to see if your nose landing gear turning collar is receiving proper treatment. Disconnect the nose landing gear torque links, grab the upper torque link and spade door and gently rotate the torque tube collar using the taxi light as an over travel guide. It should rotate with some resistance but not with undo force. If excessive force is needed, Duncan Aviation technicians have determined that a lack of lubrication is the cause. Rotating and exercising the collar in different positions while applying grease to the single grease zerk ensures that the entire circumference of the collar is well lubricated and protected from corrosion and ingress of water.
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