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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:
J60-P-3/-6 AND JT12A (NAVY ONLY)
AIRCRAFT:
(T-2B) (T-39D) (CT-39D) (CT-39G)
JOAP ATOMIC EMISSION ROTRODE
Fe
Ag
Al
Cr
Cu
Mg
Ti
Abnormal Trend
(PPM Increase
6
3
3
3
3
6
3
in 10 hrs)
Normal Range
0-20
0-6
0-8
0-6
0-7
0-18
0-8
Marginal Range
21-25
7
9
7
8
19-22
9
High Range
26-30
8
10-11
8
9-11
23-26
10-11
Abnormal
31+
9+
12+
9+
12+
27+
12+
Average Concentration Other Elements:
When Fe increases in combination with an increase in Mg, the discrepancy is usually with the accessory gear
case. When Fe increases in combination with an increase in Cu, the discrepancy may be a main shaft bearing,
usually No. 3. High, Fe, Cu and Mg in combination usually indicates discrepancy with the tower shaft bearing.
Increases in Mg by itself indicates defect in accessory gear case. Fuel contamination of oil indicates rupture of
fuel oil cooler.
Fe
Main bearing balls/rollers and races
Gearbox gears
Fe
Al
Pressure and scavenge oil pump
Fe
Ag
Cu
&
Si
Sn
Ag
Cu
&
Main bearing cages
Si
Sn
Al
Mg
Gearbox housing and adapters
Ti
Compressor rotor front hub
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