MIL-L-23699E C/I (Corrosion Inhibiting) (Cont)

NAVAIR 17-15-50.3

TM 38-301-3

T.O. 33-1-37-3

CGTO 33-1-37-3

SH-60B, SH-60F, HH-60H, MH-60R, MH-60S, and VH-60N

MAIN TRANSMISSION

NOTE

Wear particles found in an oil sample will give a false indication. Oil samples are

taken from the sump, which is on the upstream side of the 3-micron filter. When the

rotors stop turning, the oil slowly drains and flushes the debris trapped by the filter

into the sump.

SH-60B, SH-60F, HH-60H, MH-60R, MH-60S and VH-60N main transmission consists of a main module,

two input modules and two accessory modules. The main transmission has a single lubrication system

that lubricates the modules listed above as well as the gearbox driven generators. For the SH-60B, SH-

60F, HH-60H, MH-60S, MH-60R (with main module 70351-38100) and VH-60N (with main module

70351-84100), a 3-micron filter is used which effectively removes particles in the size range measurable

by spectrometric analysis. For these aircraft, only aqua-test shall be performed and for all main

transmissions, water content limit shall be 1200 PPM (0.120%). For all configurations of main

transmissions, water content that exceeds 1500 PPM shall result in a laboratory recommendation "J":

Change oil; sample after first flight. Water content between 1200 and 1500 PPM shall result in a

laboratory recommendation "C": do not change oil; resample after first flight. If resample results in water

content still above 1200 PPM, laboratory recommendation shall be "J": change oil; sample after first flight.