TM 1-1520-238-23
1-158.20
Change 9
1.49.
CORROSION CONTROL/INSPECTION – continued
(3) On ENCU temperature control unit, seal box edges and mounting screws with sealing compound
(item 160, App F) or sealing compound (item 170A, App F).
(4) On hydraulic utility manifold hydraulic pressure transducers, seal around mounting surfaces and fasteners
with sealing compound (item 162, App F) or sealing compound (item 170A, App F).
t. Main Rotor and Mast (area 8)
(1) Apply epoxy primer coating kit (item 76A, App F) or epoxy primer coating kit (item 78A, App F) to bolt
heads, nuts, exposed threads, retainers, control rod ends, linkages, and exposed metal areas. Use sealing
compound (item 162, App F) or sealing compound (item 170A, App F) as alternate, if primer is not avail-
able.
(2) Apply coating of corrosion preventive compound (item 62, App F) or fill mast support base lightening holes
with grease (item 88, App F) or petrolatum (item 138, App F). Install covers by applyng a thin coat of
adhesive (item 2, App F) or adhesive (item 3, App F) on cover face and mast base. Seal caps with sealing
compound (item 164, App F) or sealing compound (item 170C, App F).
u. Engine Nacelle – (area 9)
(1) Apply corrosion preventive compound (item 63, App F) or corrosion preventive compound (item 63A,
App F) to hinge and latch on electronic access door L295.
(2) Apply corrosion preventive compound (item 63, App F) or corrosion preventive compound (item 63A,
App F) to hinges and latches on engine access doors LN1, LN3, LN4, and LN5.
(3) Seal two holes and skin splice at top left over electrical equipment access door L295 with sealing
compound (item 164, App F) or sealing compound (item 170C, App F).
(4) Seal engine exhaust mounting bracket at fuselage in front of hydraulic access door L325 with sealing
compound (item 162, App F) or sealing compound (item 170A, App F).
(5) Apply corrosion preventive compound (item 62B, App F) to leveling jack LN1.
v. Fuselage – left side center (area 10)
(1) Seal wing mounting bolts with sealing compound (item 162, App F) or sealing compound (item 170A,
App F).
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