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Page Title:
TRANSMISSION (ARMY AND AIR FORCE ONLY) |
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 NAVAIR 17-15-50.3
TM 38-301-3
T.O. 33-1-37-3
CGTO 33-1-37-3
TH-1G, HH-1H
TRANSMISSION (ARMY AND AIR FORCE ONLY)
JOAP ATOMIC EMISSION ROTRODE
Fe
Ag
Al
Cr
Cu
Mg
Si
Abnormal Trend
(PPM Increase
6
2
7
2
4
3
7
in 10 hrs)
Normal Range
0-21
0-3
0-25
0-3
0-13
0-8
0-23
Marginal Range
22-26
N/A
26-31
4
14-16
9
24-28
High Range
27-31
4
32-38
5
17-19
10-11
29-34
Abnormal
32+
5+
39+
6+
20+
12+
35+
Average Concentration Other Elements:
Fe
Bearing load surface, main drive,
Accessory gearing and splines
Fe
&
Cu
Bearing assemblies
Mast and input quill bearing assembly
Fe
Cu
&
Ag
Input and output quill bearing assemblies
Fe
&
Al
Lower mast bearing oil distribution ring
Fe
&
Mg
Gearing and housing
Al
Oil deflector plate input quill
NOTE
1. High concentration of Fe & Mg should be expected to increase after extended
periods of inactivity because of corrosion.
2. Mast bearing shims manufactured from Al are being replaced with steel
counterpart at overhaul.
3. High Si indicates contamination probably due to sampling error.
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