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 NAVAIR 17-15-50.3
TM 38-301-3
T.O. 33-1-37-3
CGTO 33-1-37-3
H-46
FORWARD GEARBOX (NAVY ONLY)
JOAP ATOMIC EMISSION ROTRODE
Fe
Ag
Al
Cr
Cu
Mg
Abnormal Trend
(PPM Increase
13
12
4
5
in 10 hrs)
Normal Range
0-42
0-40
0-10
0-17
Marginal Range
43-52
41-50
11-12
18-21
High Range
53-63
51-58
13-14
22-25
Abnormal
64+
59+
15+
26+
Average Concentration Other Elements:
Fe
Bearing assemblies
Cu
Sump filter or inlet filter, bearing cages
Al
&
Fe
Upper case and bearing assemblies
Mg
&
Fe
Lower case and bearing assemblies, corrosion
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