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 NAVAIR 17-15-50.3
TM 38-301-3
T.O. 33-1-37-3
CGTO 33-1-37-3
CH-34C
INTERMEDIATE TRANSMISSION
JOAP ATOMIC EMISSION ROTRODE
Fe
Ag
Al
Cr
Cu
Mg
Si
Abnormal Trend
(PPM Increase
12
2
6
4
4
4
5
in 10 hrs)
Normal Range
0-40
0-3
0-20
0-14
0-12
0-14
0-19
Marginal Range
41-50
N/A
21-25
15-17
13-14
15-17
20-23
High Range
51-61
4
26-29
18-21
15-18
18-22
24-28
Abnormal
62+
5+
30+
22+
19+
23+
29+
Average Concentration Other Elements:
Fe
Fe
&
Cu
Bearings and races
Fe
&
Mg
Bearing
NOTE
1. High concentration of Fe & Mg could also indicate corrosion due to moisture in the
system.
2. High concentration Si indicates contamination probably due to sand and dirt or
silicon rubber parts or presence of anti-foaming additive.
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