Aerospace Filtration Systems, Inc.
MD500-IBF-KIT-OMM/IPL
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Information
Use or disclosure of this material is subject
MD500 IBF Operation & Maintenance Manual/
to the restrictions on the title page
Illustrated Parts List - Revision B
7
Forward Filter Removal
CAUTION
After removal of the filter assemblies, inspect the
filter seals on the aircraft for visible damage and
security.
CAUTION
After removal of the filter assemblies, cover the
engine inlet to ensure it is protected from FOD, if
the assemblies are not reinstalled immediately.
To remove the forward filter assembly, remove the right detachable forward upper inlet
fairing. Remove the (10) Phillips head screws that secure the oil cooler FOD screen,
remove the FOD screen. Disengage the (8) captive Dzus type fasteners that fasten the
forward filter assembly to the forward frame. A ¼ turn (counterclockwise) with a slotted
screwdriver is all that is required to remove the Dzus stud (screw head) from the
receptacle. The forward filter assembly seal is attached to the forward frame.
Forward Filter Installation
WARNING
Prior to installation of the filter assemblies,
remove any FOD protection from the engine
bellmouth.
Prior to installation of serviced filter assembly, the seal shall be visually inspected for
security and damage. Insure that the forward filter assembly is seated properly in the
forward frame. Engage the (8) captive Dzus type fasteners by rotating ¼ turn clockwise
and ensure the seal is uniformly compressed. Do not over rotate the fasteners, over
rotation will result in damage to the stud and/or the receptacle. Reinstall the oil cooler
FOD screen and secure with (10) Phillips head screws.
3.4 I
NSPECTION AND
P
RE
-C
LEANING
Remove the filter elements and inspect the serviceability tag. If all the blocks have been marked
through, the assembly should be discarded and replaced with a new or other serviceable
assembly. If there are service cycles left on the assembly, proceed with pre-cleaning. Carefully
remove any large debris by hand or with tweezers then gently brush the dirty side of the filter
with a soft bristle brush similar to a soft paintbrush to remove any heavy deposits.
Summary of Contents for MD500 Series
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