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Page Title:
Lycoming AGT 1500 Turbine (Engine) |
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 NAVAIR 17-15-50.4
TM 38-301-4
T.O. 33-1-37-4
CGTO 33-1-37-4
COMPONENT:
Lycoming AGT 1500 Turbine (Engine)
LUBRICANT: MIL-L-23699
Fe
Ag
Al
Cr
Cu
Si
Ti
Ni
Pb
Mo
Zn
Normal Range
0-14
0-3
0-3
0-1
0-3
0-32
0-2
0-1
0-3
04
0-13
Marginal Range
15-16
4
4
2
4
33-38
3
2
4
5
14-16
High Range
17-20
5
5
3
5
39-50
4
3
5
6-7
17-19
Abnormal
21+
6+
6+
4+
6+
51+
5+
4+
6+
8+
20+
Abnormal Trend
(PPM Increase
4
2
2
2
2
10
2
2
2
2
4
in 10 hrs)
TECHNICAL INFORMATION
Engine oil is employed for cooling alternator.
Engine oil-wetted splines are used in accessory and reduction
gearboxes (AGB and RGB).
Low levels (13 ppm) of zinc (Zn) may indicate use of galvanized
containers for handling engine oil. This is harmless.
Over 75 ppm Zn with calcium (Ca), magnesium (Mg), or barium
(Ba) present indicates transmission oil mixed with engine oil. Up
to 10% transmission oil in engine oil can be tolerated indefinitely.
External sources should be considered first when attempting to
explain Zn levels.
Iron (Fe) is by far the most important wear metal to monitor.
APPLICABLE END ITEMS
M1, M1E1
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