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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:
O-470-4 (NAVY ONLY)
AIRCRAFT:
(T-34B)
JOAP ATOMIC EMISSION ROTRODE
Fe
Ag
Al
Cr
Cu
Mg
Abnormal Trend
*
(PPM Increase
9
13
23/12
in 10 hrs)
0-76/*
Normal Range
0-64
0-30
0-40
77-96/*
Marginal Range
65-78
31-36
41-50
97-
High Range
79-91
37-46
115/*
51-59
*
Abnormal
92+
47+
116/60+
Average Concentration Other Elements:
* For newly reworked engine with other metal normal (up to 150-200 operating hours after overhaul).
Increases in Fe and Al are indicative of upper cylinder problems. Increase in Cu or in combination with Fe
indicates rod and main bearing wear.
Fe
Push rods, camshaft, cylinder barrels, rocker arms, crankshaft valve
lifters, valve spring washers, valve springs
Fe
Ni +
Cr
Oil pump gears, crankshaft cluster gear, governor drive gears,
camshaft gears, piston rings
Cu
Pb +
Sn
Valve rocker bushings, accessory drive bushings, main bearings,
connecting rod bearings
Cu
Sn +
Zn
Valve guides, piston pin bushings
Fe
Cr Ni
Valves
Si +
W
Al
Cu Ni
+
Mg
Pistons, crankcase, cylinder head
Mg
Cu +
Al
Crankcase rear cover

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