TB 1-1615-351-23
(1) Removing the main rotor blades makes the coating easier, but removal is not mandatory. The tail rotor
blades should not be removed. If blades are removed and are expected to be reinstalled on the same aircraft, the blades
and grips should be marked so that blades can be reinstalled at the same location. This will greatly reduce track and
balance time.
CAUTION
Blades should not be positioned vertically since this promotes movement of the
coating away from the leading edge where it is needed most.
(2) If desired, remove main rotor blades per the applicable aircraft TM. Position blades on table or blade rack in
horizontal/flat position. Allow the leading edge to stick out over the edge of the rack approximately 2 inches.
d. Layout and Mask (Step 2).
(1) Local greasy spots should be cleaned using denatured or isopropyl alcohol.
(2) Layout and mask the total area of the main and tail rotor blades to be protected with the coating per the
applicable aircraft illustrations in Chapter 2. It is important that all blades in a set be masked the same.
e. Surface Preparation and Cleaning (Step 3),
CAUTION
Before sanding and application of TASK L-100, ensure all rotor blades are either
primed and/or painted with lacquer or care paint per the applicable aircraft
technical manual.
CAUTION
Do not sand the bare metal skin of helicopter rotor blades. Sanding bare metal
skin on helicopter rotor blades reduces the structural integrity and fatigue life of
the blade.
(1) Sand the area to be coated to remove bugs, dirt and oxidized coating. As a minimum, scuff the existing paint
over the total area to be protected. Always scuff in a spanwise direction. Use of power polishing sander is allowed for
this procedure.
(2) Dry wipe the blade with a clean cheesecloth or towel to remove the sanding residue. Wipe the blade several
times with cheesecloth dampened with denatured or isopropyl alcohol, then wipe once again with dry cheesecloth.
CAUTION
Do not touch or contaminate the prepared surface after it is wiped.
(3) Inspect the surface for any greasy looking areas. Sand these areas a little more vigorously to take away the
sheen. Wipe the blade again with the cheesecloth. The blade should now be dry and free from sanding residue.
