TB 1-1615-351-23
j. Install Blades (Step 7) (Optional w/step 1). Install rotor blades per the applicable aircraft Technical Manual.
NOTE
Cure time before track and balance is 6 hours at 77 degrees Fahrenheit. A 24-hour
cure time is recommended if temperature during curing is unknown.
NOTE
Mixing of coated blades and uncoated blades is prohibited.
k. Check Track and Balance (Step 8). Check track and balance of the main and tail rotors per the applicable aircraft
Technical Manual.
Section IV. REPAIR AND REMOVAL PROCEDURES
a. Peeling and Tattering. This condition is most prevalent where the material is thinnest. The blades should be
inspected after flight and the loose material, if any, should simply be trimmed off with a sharp knife. It is not necessary to
re-coat the bare area until there is enough area to justify a coating cure cycle of six or more hours.
b. Nicks and Cuts.
NOTE
Cure time before track and balance is 6 hours at 77 degrees Fahrenheit. A 24 hour
cure time is recommended if temperature during curing is unknown.
CAUTION
Be careful when using a knife for trimming. Do not cut into the blade. The safest
technique is to work the knife under the loose material and cut parallel to the blade
surface.
(1) This condition is caused by larger debris and will usually be found close to the leading edge and in the
outboard one-third of the rotor span. If the cut is of average size the surrounding material will not be damaged and no
debonding will occur. This type of damage to the coating should not be treated until it is expected that further flight would
cause that area to debond and tear away. If that is the case, then cut out the debonded area with a sharp knife. Only
remove the debonded area. Repair by applying fresh coating, in several applications if necessary, to restore the coating
to its original thickness. Allow the coating to set for at least six hours before bringing the rotor up to speed or flying the
aircraft.
(2) If mission requirements will not permit the proper time for repair and curing, simply cut away the loosened
material and fly.
