Aerospace Filtration Systems, Inc.
MD500-IBF-KIT-OMM/IPL
Proprietary
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
4
2.2 S
TANDARD
E
NVIRONMENT
R
EQUIREMENTS
During normal conditions and typical operations in and out of prepared airfields and landing
sites, the IBF filter elements will not require frequent servicing. A Power Check should be
performed every 25 aircraft operating hours to gage the rate of engine performance degradation
due to changes in engine inlet pressure drop as the filters accumulate dirt. This is recommended
after the first installation and operation of an IBF system with an operator with no prior
experience or following relocation to an unknown environment. After establishment of a trend
and experience with the IBF system, the Power Check interval may be increased as deemed
reasonable. It is recommended, however, that a Power Check be performed at a minimum every
100 operating hours.
2.3 D
ESERT
E
NVIRONMENT
R
EQUIREMENTS
When operating in an environment of high airborne sand and dust levels, frequent servicing of
the filter elements may be required based on the time exposure to the environment. Any
operations in this type environment that can result in “brown out” (i.e. severe dust) type
conditions should therefore be minimized or avoided to the maximum extent possible. If
extended time is being accumulated operating in “brown out” conditions, a Power Check could
be required at as low as 10-hour intervals. This reduced interval will be based on the judgment
of the pilot. It is recommended that for normal operations in a desert environment that Power
Checks be conducted every 25 hours. Servicing requirements for engines operating in this type
of environment will be primarily based on the indicated degradation of the engine performance
as determined by the Power Check results. Regular operation in a fine sand and dust
environment can cause oil loss from the element thus reducing the filter’s separation efficiency.
Under such circumstances occasional re-oiling of the element's clean side may be necessary
based on the coloration of the element.
NOTE:
Visual inspection for loss of oil should be done on
the clean side or down stream side of the filter
assembly.
2.4 E
NGINE
W
ATER
W
ASH
/R
INSE
Do not deviate from the published OEM (Rolls-Royce) procedures.
2.5 U
NCOVERED
S
TORAGE
If an IBF equipped aircraft is stored uncovered and exposed to the environment (rain, snow, etc.)
or direct sunlight, the upper filter assembly must be protected and the forward filter assembly
inlet duct should be protected from snow accumulation (see paragraph 2.6 below). In particular,
the cover must be used to protect the upper filter assembly since long-term exposure to sunlight
may degrade the filtration characteristics of the media and generate a service cycle.
Summary of Contents for MD500 Series
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