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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:
TF39-GE-1C
AIRCRAFT:
(C-5)
JOAP ATOMIC EMISSION ROTRODE
Fe
Ag
Al
Cr
Cu
Mg
Ti
Abnormal Trend
(PPM Increase
25
3
8
4
4
10
8
in 10 hrs)*
Normal Range
0-12
0-1
0-1
0-1
0-6
0-40
0-3
Marginal Range
13-38
2-4
2-4
2
7-13
41-65
4-7
High Range
39-74
5-9
5-14
3-9
14-19
66-103
8-15
Abnormal
75+
10+
15+
10+
20+
104+
16+
Average Concentration Other Elements:
Ni=1
Pb=1
Si=1
Sn=8
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.
Fe
Inlet and transfer gearbox bearing housings and retainers
Fe
&
Ag
Inlet and transfer gearbox shafts
Fe
&
Cr
No. 1 and 3 main bearing rollers and races
Fe
&
Ni
No. 4B bearing housing spanner nut
Fe
&
Mn
Lube and scavenge pump shaft and elements.
Fe
&
Ag
Ni
No. 1 main bearing cages
Fe
&
Cr
Ni
Inlet and transfer gearbox gears
Fe
&
Cr
Cu
Ni
Nos. 4, 6 and 7 main bearing rotating oil seals
Fe
&
Ag Cr
Nos. 4, 5, 6 and 7 main bearing stationary air and oil seal
Cu Ni
Fe
&
Cr
Mo
V
Nos. 2, 4, 5, 6 and 7 main bearing rollers and races
No. 5 main bearing fan shaft
Fe
&
Ni
Co
Mo No. 2 main bearing fan shaft
Al
&
Mg
Lube and scavenge pump air/oil separator seal
Al
&
Si
Forward scavenge pump housing
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