PS Magazine - TB 43-PS-598
PS, The Preventative Maintenance Monthly
ISSUE 598
SEPTEMBER 2002
Then your electrician has to drain and purge the pitot-
static system like it says in Task 8-25 and 8-26 of TM 55-
1520-240-23-7 to get the moisture out of the lines.
PS 598
SEP 02
39
High pressure water can also damage the finish, and wash
grease out of lubricated parts. So turn down the pressure on
your washers and use a nozzle that doesn’t blast water.
If that’s not bad enough, directing water at your bird’s
pitot-static system sideslip ports, static ports and tubes will
cause moisture problems in the lines. That can lead to bad
readings on flight instruments like your airspeed indicator and
the vertical speed indicator.
High-powered water may get your bird clean as a whistle,
but it can damage the skin or knock off antennas.
When the next washing comes up, don’t blast water into the
drain holes at the rear of the aircraft near the cargo door. That
contaminates fuel and hydraulic, engine and transmission oil.
Do not
direct water
at drain
holes on
right side…
…or left
side
Turn down the
water pressure
and use a little
elbow grease
to wash away
the crud.
Cover holes with duct
tape before washing
good work
fellas! a little
elbow
grease
and
low
pressure water
gets
the job done
right
and
doesn’t contaminate my
fuel and oil!
Mechanics,
don’t wash your
Chinook with high
pressure water
to blow away
grit, grime
and dirt.
CH-47D…
598. 38-39 (C)
7/29/02
1:38 PM
Page 1
Back to TopBack to Top
