Aircraft Maintenance Technology - 15

equipment OEM is on the use and application of our products to
meet our customers' specific needs. We also work closely with
aircraft OEM training organizations and professional training
organizations such as Abaris Training.
Composite repair requires a great deal of tactile skills associated
with damage removal, taper sanding and other surface preparation
methods that are usually done with a high RPM angle grinder. It also
requires a great deal of knowledge about the constituent materials
(resin, fiber, core, etc.) in the structure, the fiber axial orientation
of each layer and a fundamental knowledge about vacuum bagging
and cure processes. This includes understanding thermocouple
placement and how to use hot-bond process equipment. These
skills take time to acquire and must be practiced to stay proficient.
"Training has evolved over time with the industry to use more
common and efficient repair methods and techniques (for example:
taper scarf vs step repair), noted Lou Dorworth, direct services
manager, Abaris Training. "A great deal of emphasis is placed on
teaching students the underlying fundamentals of composite materials and processes, reinforcing why a certain method or process is
prescribed in the repair instructions. This approach is far better
than just teaching a student how to do a repair. The best courses
are designed to promote the 'why' and practice the 'how' so the
technician or mechanic is inclined to follow best practices."
Dorworth says the deployment of large aircraft composite primary structures has shifted the discussion from a decade ago
where repairs to fairings and control surfaces were common, to
now where repairs might include highly-loaded fuselage and wing
structures. "Technically, the approach to repairs is the same, but on
a far greater scale and with flight critical consequences if a repair is
to fail," he explained. "As a result, there are far more process steps
and quality checks involved in the repairs and training is stepped
up to address these requirements."
Most companies have their own safety guidelines, but many of
the more common requirements can be taught in class, Dorworth
notes. Classroom discussion of the various routes of exposure, protection methods and composite specific concerns such as handling
solvents, resins, fibers and avoiding carbon splinters is all part of
the curriculum. Personal protective equipment (PPE) is a fundamental part of composite repair training where gloves, shop-coats,
eye protection and dust masks are employed for protection from
exposure. Other hazard and safety awareness is brought to the
students as they encounter issues in the workshop. In general, it
boils down to promoting common sense.
When it comes to prepeg materials, Dorworth says they are much
better suited for high-performance applications and are often prescribed for repairs to primary structure. "A number of Abaris courses
use prepregs and hot bonder processes in their repair training,"
he noted. "Having said this, wet layup materials are still valid for
limited applications and we still teach students the proper methods
and techniques for achieving quality repairs." It is important to
note that the general aviation community uses a great deal of wet
layup for repairs that fall within the guidelines of the structural
repair manual. Abaris has a course specific to GA repairs.

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15


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Aircraft Maintenance Technology

Table of Contents for the Digital Edition of Aircraft Maintenance Technology

Editor's Takeoff: We Are Alone, Together
Developing a Strong Bond
Tech Spotlight: Meeting Military Standards
Paints and Coatings: State of the Industry Report: Aircraft Paints & Coatings
Special Feature: Does Your Coating Thickness Meet Spec?
MRO Feature: The Journey of Elliott Aviation
Product Focus: Ladders, Stands & Platforms - Build, Tear Down, Reuse
ARSA Insight: What Relief Looks Like
GAMA Insight: Strengthening the General Aviation Workforce
Professionalism: Compassionate Leadership During the COVID-19 Pandemic
Shop Talk: Welcome to Papa's Playhouse
Aircraft Maintenance Technology - 1
Aircraft Maintenance Technology - 2
Aircraft Maintenance Technology - 3
Aircraft Maintenance Technology - Editor's Takeoff: We Are Alone, Together
Aircraft Maintenance Technology - 5
Aircraft Maintenance Technology - 6
Aircraft Maintenance Technology - 7
Aircraft Maintenance Technology - 8
Aircraft Maintenance Technology - 9
Aircraft Maintenance Technology - Developing a Strong Bond
Aircraft Maintenance Technology - 11
Aircraft Maintenance Technology - 12
Aircraft Maintenance Technology - 13
Aircraft Maintenance Technology - 14
Aircraft Maintenance Technology - 15
Aircraft Maintenance Technology - Tech Spotlight: Meeting Military Standards
Aircraft Maintenance Technology - 17
Aircraft Maintenance Technology - 18
Aircraft Maintenance Technology - 19
Aircraft Maintenance Technology - 20
Aircraft Maintenance Technology - 21
Aircraft Maintenance Technology - 22
Aircraft Maintenance Technology - 23
Aircraft Maintenance Technology - Paints and Coatings: State of the Industry Report: Aircraft Paints & Coatings
Aircraft Maintenance Technology - 25
Aircraft Maintenance Technology - 26
Aircraft Maintenance Technology - 27
Aircraft Maintenance Technology - 28
Aircraft Maintenance Technology - 29
Aircraft Maintenance Technology - Special Feature: Does Your Coating Thickness Meet Spec?
Aircraft Maintenance Technology - 31
Aircraft Maintenance Technology - 32
Aircraft Maintenance Technology - 33
Aircraft Maintenance Technology - MRO Feature: The Journey of Elliott Aviation
Aircraft Maintenance Technology - 35
Aircraft Maintenance Technology - 36
Aircraft Maintenance Technology - 37
Aircraft Maintenance Technology - Product Focus: Ladders, Stands & Platforms - Build, Tear Down, Reuse
Aircraft Maintenance Technology - 39
Aircraft Maintenance Technology - 40
Aircraft Maintenance Technology - 41
Aircraft Maintenance Technology - 42
Aircraft Maintenance Technology - 43
Aircraft Maintenance Technology - ARSA Insight: What Relief Looks Like
Aircraft Maintenance Technology - 45
Aircraft Maintenance Technology - GAMA Insight: Strengthening the General Aviation Workforce
Aircraft Maintenance Technology - 47
Aircraft Maintenance Technology - Professionalism: Compassionate Leadership During the COVID-19 Pandemic
Aircraft Maintenance Technology - 49
Aircraft Maintenance Technology - Shop Talk: Welcome to Papa's Playhouse
Aircraft Maintenance Technology - 51
Aircraft Maintenance Technology - 52
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