TM 1-1520-238-23 Change 9 1-158.33 1.49. CORROSION CONTROL/INSPECTION – continued 5 Tail landing gear Apply to all bolt heads, nuts, and exposed threads at strut frame mount. Apply to all bolt heads, nuts, and exposed threads on trailing arm and wheel. Apply epoxy primer coating kit (item 78A, App F) to wheel lug nuts, then apply topcoat polyurethane coating (item 140B, App F). 8 Main rotor and mast Apply to all bolt heads, nuts, exposed threads, retainers, control rod ends, linkages, and exposed metal areas. 10 Landing gear Apply epoxy primer coating kit (item 78A, App F) to wheel lug nuts, then apply topcoat polyurethane coating (item 140B, App F). Application of sealing compound (item 162, App F) or sealing compound (item 170A, App F) in coastal and tropical areas. NOTE: 1. Inspect and reapply when there are visible cracks or loss of adhesion. 2. Where torque stripe is used, apply corrosion preventive compound (item 62B, App F). Area Location Specifics 1 Main Landing gear Apply to all bolt heads, nuts, exposed threads, and metal connectors on shock strut. Apply to metal clamps on trailing arm and all unprotected, exposed metal areas at upper end. 2 Fuselage – right side, center Apply to wing mounting bolts. Transmission deck Apply to screw heads, seams, and mounting brackets on air speed transducer. Apply to screw heads, mounting brackets, and seams on both air speed transducers. 3 Engine nacelle – right Apply corrosion preventive compound (item 62B, App F) to leveling jack RN1. 4 Fuselage – right side, aft Apply to all tail rotor drive shaft hanger mount bolts. Apply to all tail rotor drive shaft coupling flanges and bolts. 5 Tail section Apply to vertical stabilizer mounting bolts. Apply to horizontal stabilator mounting bolts and servo attachment fittings. Directional servo actuator Seal cracks at base. Intermediate gearbox Apply to all bolt heads, nuts, exposed threads, and fittings. Tail rotor gearbox Apply to all bolt heads, nuts, exposed threads, and fittings. 9 Engine nacelle Apply corrosion preventive compound (item 62B, App F) to leveling jack LN1. 10 Fuselage – left side, center Apply to wing mounting bolts. 11 Fuselage – left side, forward Apply to metal clamps on trailing arm and all unprotected, exposed metal areas at upper end. GO TO NEXT PAGE