AIRLINE
12 MAY 2016 AIRCRAFT MAINTENANCE TECHNOLOGY
tasks often mandated by OEMs through
service bulletins due to deposits or dete-
rioration of oil. In many cases, the time
between cleaning or inspections can be
extended or their associated work scope
reduced when the operator is using an
HPC oil. The deposit-reducing tendency
of HPC oils provide for a cleaner operat-
ing engine and associated lower concerns
over blockage of critical oil supply and
scavenge tubes.
Eastman developed a Value Proven
Tool that quantifies the potential main-
tenance savings an operator will enjoy
for these affected engines should they
utilize an HPC class oil such as ETO 2197.
AMT: How does oil type affect inspec-
tion and/or maintenance activity?
PF: HPC oil performance has allowed
OEMs to revise traditional maintenance
and inspection intervals in some cases. It
also helps reduce time between mainte-
nance intervals. Switching from standard
to high performance oil can have a very
beneficial effect on internal component
wear. You can model examples of the pos-
itive effects of using High Performance
Capable oil on the Eastman Value Proven
Tool.
AMT: Has there been any studies linking
operating hours to engine cleanliness?
PF: Eastman has completed a num-
ber of studies comparing component
health using both Standard Performance
Capable and High Performance Capable
oils. These critical components include oil
vent tubes, bearings, and oil supply tubes.
Significant benefits are seen in using HPC
oils versus SPC oils indicated by lower
levels of carbon deposits and a reduc-
tion in tube blockage over extended time
periods. With respect to bearing areas,
cleanliness was also noted to be substan-
tially improved with HPC class oils. All
these benefits can be attributed directly
to the higher thermal stability offered by
HPC oils.
More information can be found at www.
eastman.com/Brands/EAS/Pages/Home.
aspx including the online resource Value
Proven Tool. Paul Fridman can be reached
at pfridman@eastman.com.
TURBINE
ENGINE oil testing
equipment in
the Eastman
laboratory.
EASTMAN AVIATION
SOLUTIONS
TOP:
SCAVENGE
tube using
SPC oils.
BOTTOM:
SCAVENGE
tube using
HPC oils.
EASTMAN
AVIATION
SOLUTIONS