INTERMEDIATE GEARBOX (NAVY ONLY)

NAVAIR 17-15-50.3

TM 38-301-3

T.O. 33-1-37-3

CGTO 33-1-37-3

SH-2G

INTERMEDIATE GEARBOX (NAVY ONLY)

JOAP ATOMIC EMISSION ROTRODE

Abnormal Trend

(PPM Increase

in 10 hrs)

Normal Range

0-54

0-25

0-20

0-26

Marginal Range

55-64

26-31

21-25

27-32

High Range

65-80

32-37

26-30

33-39

Abnormal

81+

38+

31+

40+

Average Concentration Other Elements:

WATER LIMIT: 1,000 ppm on 0.100% (if equipment is available at lab)

The intermediate gearbox has a self-contained oil system without an oil filter. Normal

wear particles will continue to increase until the gearbox is drained, flushed and re-

serviced in accordance with NAVAIR 01-260HCD-2-4.1. Water in the oil will cause high

iron and magnesium because of corrosion. When high or abnormal wear metal

readings are obtained, check the oil for water content. If high or abnormal wear metals

are detected and/or the water content of the oil exceeds 1,000 ppm (0.100%)*, the

laboratory recommendation should be "flush gearbox, re-service and perform

serviceability check in accordance with NAVAIR 01-260HCD-2-4.1. Submit oil sample

after serviceability check and special oil sample after 10 flight hours of operation for

both wear metals and water content."

*Water content check dependent on special equipment availability.

High metal readings without exceeding 1000 ppm water content may result in a

laboratory recommendation for flushing or removal of the gearbox. A minimum of two

consecutive high readings is required prior to recommending flushing or gearbox

removal. Furnish CFA with five previous NOAP readings when recommending gearbox

removal.

A124