TM 55-2840-231-23
1-40. Pressurized Container - Inspection - Continued
LOCATION/lTEM
REMARKS
ACTION
ENGINE CONTAINER/ -
NOTE
Continued
An all blue in the humidity indicator
indicates a safe condition. As moisture
content inside the container increases,
the indicator color will change from
blue to pink. An all pink condition is
considered unsafe and indicates that
the desiccant must be changed and the
container repressurized.
1. Humidity Indicator
If the humidity indicator indicates that the
relative humidity is less than 40 percent and
the internal pressure is more than 1 psig,
no maintenance is necessary until the next
regular inspection.
2. Humidity Indicator
If the humidity indicator indicates that the
relative humidity is less than 40 percent but
the internal pressure is less than 1 psig, the
container shall be checked for leakage, using
a soap solution at all closures. (Refer to
TB 55-8100-200-25.) When leakage has
been corrected, the container shall be repres-
surized to the value stated in table 1-5. Use
clean dry compressed air. Record date of
repressurization and name of activity in ap-
propriate section of engine historical record.
3. Humidity Indicator
If the humidity indicator indicates the rela-
tive humidity to be 40 percent or more, an
unsafe or corrosive condition exists. Correct
as follows:
a. Depressurize shipping
container by opening
air filling valve at front
of container.
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