March-April_2022 - 23

* Application of corrosion preventing
chemicals
* Removal of corrosion from aircraft
structure
* Replacement of worn or broken parts
* Cleaning aircraft structure and skins
* Repair and overhaul of aircraft
components
Broadly, this work will be taken care of
during inspections.
" There's inspection programs that the
engineers and manufacturers have put
together. They are either time-based, like
on a calendar, or usage-based, like with
flight hours, " said Logsdon.
" The majority of the manufacturers have
done a ton of studies ahead of time so that
items are being inspected and replaced
prior to a failure rate. A lot of overhaul and
replacement items are what a customer
would probably consider preventative, "
added Saathoff.
95%
of aircraft maintenance
can be classified
as preventative
Saathoff gives the example of many turboprop
and similar aircraft having thousand-hour
requirements. At a thousand
hours, their generators come off and get
overhauled back to manufacturers' standards,
with the hope they run for another
thousand hours.
" All aircraft are going to have their specific
requirements based on their chapter
four and chapter five requirements to their
maintenance manual. Air worthiness standards
to keep them legal and flying are all
things that are put in place for the safety
and the best operation of that airplane, "
he continued.
Not Without Its Challenges
While scheduled inspections and flight
hour-based work give preventative maintenance
a backbone of support, again, what
may seem like straightforward work is not
always so. Saathoff said a " if it's not broke,
why fix it? " mentality among an aircraft
owner can often be an issue.
" Preventative maintenance is sometimes
difficult for an owner or operator to want to
do. Because in some situations, it's not broke
right now. Or it's not failing right now, it's
currently working. And so, some operators
may resist the urge to, or may resist wanting
to do that work now, " he said.
Saathoff said imparting the knowledge of
why preventative maintenance is so crucial
can be the greatest obstacle.
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March-April_2022

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