Some rotor blades may be painted with acrylic lacquer and MEK can adversely
affect this paint and the subsequent quality of the erosion protection. In this case,
MEK should not be used as a cleaning agent.
(2) Scuff area on blade to be covered using abrasive paper. Clean surface using cheesecloth or machinery towel
dampened with isopropyl or denatured alcohol, then wipe once again with a clean, dry cloth.
(3) Cut 2 pieces of 4-inch polyurethane tape, one piece 27.5-inch long and one piece 15.5-inch long per blade.
(4) Mix abrasion adhesive promoter, diluted in equal parts with toluene, using wooden spatula, and 1-quart
(5) Apply thin coat to area to be covered by tape using paint brush. Minimum drying time 5 minutes. Tape must
be applied maximum 1-hour after promoter application.
Application of all tape segments is the same.
Make sure tape does not contact adhesive promoter, until properly aligned.
(6) Peel center backing strip on 15.5-inch-long polyurethane tape back 3-inches.
Align with leading edge of
(7) Apply tape to tail rotor blade starting at leading edge and working toward trailing edge. Work out gaps, air,
and strained areas under tape. Bubbles greater than 0.2 square-inch area within 2-inches of each other not allowed. No
curing time required. Any bubbles encountered during the application process may be removed by continuous squeegee
stroking towards the edge of tape or by puncturing the bubbles with a needle and applying pressure to the wet adhesive.
Do not puncture bubbles after the adhesive has dried.