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 NAVAIR 17-15-50.3
TM 38-301-3
T.O. 33-1-37-3
CGTO 33-1-37-3
ENGINE: T53-L-13B (AIR FORCE)
AIRCRAFT: (HH-1H)
JOAP ATOMIC EMISSION ROTRODE
Fe
Ag
Al
Cr
Cu
Mg
Si
Abnormal Trend
(PPM Increase
4
2
4
2
3
4
10
in 10 hrs)*
Normal Range
0-10
0
0
0
0
0
0-15
Marginal Range
11-16
1-3
1-12
1-6
1-9
1-12
16-40
High Range
17-19
4
13-14
7
10-11
13-14
41-49
Abnormal
20+
5+
15+
8+
12+
15+
50+
Average Concentration Other Elements:
Ni=1
Pb=1
Sn=9
Ti=1
Mo=1
*
If the calculated PPM trend value is equal to or greater than the trend PPM value limit, the engine has an
abnormal trend.
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