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 NAVAIR 17-15-50.3
TM 38-301-3
T.O. 33-1-37-3
CGTO 33-1-37-3
AH-1W, HH-1N, UH-1N (NAVY)
90 TAIL ROTOR GEARBOX
JOAP ATOMIC EMISSION ROTRODE
Fe
Ag
Al
Cr
Cu
Mg
Abnormal Trend
(PPM Increase
30
45
12
in 10 hrs)
Normal Range
0-100
0-150
0-40
151-
101-
41-50
Marginal Range
185
124
186-
125-
51-59
High Range
218
152
Abnormal
153+
219+
60+
Average Concentration Other Elements:
WATER LIMIT: 1,000 ppm or 0.100% (if equipment available at lab)
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