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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: JT8D-9A (NAVY ONLY)
AIRCRAFT: (C-9B/DC-9)
JOAP ATOMIC EMISSION ROTRODE
Fe
Ag
Al
Cr
Cu
Mg
Ni
Si
Ti
Abnormal Trend
(PPM Increase
5
2
2
2
3
3
2
5
3
in 10 hrs)*
Normal Range
0-15
0-3
0-5
0-3
0-5
0-5
0-3
0-16
0-5
Marginal Range
16-19
4-6
6-7
4-6
6-7
6-7
4-5
17-24
6-7
High Range
20-24
7-8
8-9
7-9
8-9
8-9
6-8
25-49
8-9
Abnormal
25+
9+
10+
10+
10+
10+
9+
50+
10+
Average Concentration Other Elements:
*
If the calculated PPM trend value is equal to or greater than the trend PPM value limit, the
engine has an abnormal trend.
NOTES
1. Marginal Range:
a. Reduce sampling interval to every 100 hours for 200 hours.
b. If PPM remains in marginal range or decreases to normal range, return to routine sampling
intervals.
2. High Range:
a. Within 10 hours, visually inspect the oil filter and electrically inspect chip detectors in
accordance with NAVAIR 01-C9B-2-79.
b. Resample oil and perform spectrometric oil analysis every 100 hours for 400 hours.
c. If PPM remains in the high range or decreases into marginal range, and no metal is
evident in the oil system, return to routine oil sampling intervals.
3. Abnormal Range or Abnormal Trends:
a. Within 10 flight hours, remove and visually inspect main oil filter and chip detectors in
accordance with NAVAIR 01-C9B-2-79.
b. Within 50 hours, resample oil for Spectrometric Analysis.
c. If PPM remains in the abnormal range after the 50 hour sample, the oil lab should contact
the CFA for disposition prior to issuing further recommendations. The operator should contact the
CFA for further direction through the appropriate chain of command.
CFA: DSN: 342-3575/ COMM (301) 342-3575 FAX: 342-3965/ COMM (301) 342-3965
MESSAGE:
PROGMGR AIR TWO TWO SEVEN PATUXENT RIVER MD//2271B1//
MAILSTOP 34 CODE 2271B1
46989 MCLEOD ROAD
NAS PATUXENT RIVER MD 20670-5449
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