TM 1-1520-238-23
1-158.24
Change 9
1.49.
CORROSION CONTROL/INSPECTION – continued
b. Rinsing Procedure
(1) Rinse aircraft with a soft fan-spray pattern to avoid damage and water intrusion.
(2) Rinse external surfaces at a flow of 8 gallons (30 litters) per minute at a 20 to 25 PSI (140 to 170 kPa)
supply pressure.
(3) Direct water at an angle of 15 to 30 degrees from the surface.
(4) Reapply corrosion preventive compound (item 63, App F) on structural components, and corrosion
preventive compound (item 64, App F) on electrical components after each rinse.
(5) Wipe out standing water on transmission deck.
(6) Ensure that there is not standing water in the tailboom.
c. Washing Procedure
(1) Rinse aircraft surface with fresh water to reduce skin temperature.
(2) Prepare cleaning compound (item 44, App F) or cleaning compound (item 44A, App F) in accordance with
manufacturer’s instructions. Apply from a bucket, spraying equipment, or foaming equipment. Scrub
surfaces as necessary with aircraft cleaning kit or with a brush.
(3) Rinse the cleaner and loosened soil from aircraft surface with a fan spray nozzle directed at an angle
between 15 and 30 degrees from the surface. Continue rinsing until all evidence of cleaner and soils have
been removed from aircraft.
(4) Reapply corrosion preventive compound (item 63, App F) or corrosion preventive compound (item 63A,
App F) on structural components, and corrosion preventive compound (item 64, App F) on electrical
components and avionics after each rinse, followed by corrosion preventive compound (item 62B, App F),
if required.
(5) Wipe out standing water on transmission deck.
(6) Ensure that there is not standing water in the tailboom.
d. Cleaning Wipe-Down
(1) For component cleaning wipe-down, use corrosion preventive compound (item 63, App F) or corrosion
preventive compound (item 63A, App F) on structural components, and corrosion preventive compound
(item 64, App F) on electrical and avionic components.
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