Technical data

6.12.22.3 Installation.
• The temperature during application shall be at
least 60° F. This may be accomplished with a
ground heater for small areas.
• Materials to make repairs or remove the tape
must be available in case of errors in applica-
tion.
• Use only the tapes specified in Table 6-2 for
application on aircraft exterior surfaces.
• Adhesion promoters in Table 6-2 can not be
substituted. If not available, do not apply tape.
• Pre-scored liner material is very critical for
proper installation. Without the slit liner, ap-
plication is very difficult.
• Do not apply tape to bare metal. Surfaces must
at least be primed before film is applied. Allow
primer to cure for 24 hours minimum before
tape application.
a. Feather, sand, prime, and paint the leading edge as
required. Feathering chipped/peeled areas is vital for a
quality installation. Recommend material be applied to
aircraft in conjunction with touch-up painting.
b. Using the template fabricated per Table 6-2, align its
centerline with the centerline of the leading edge. Mark
the location of the top and bottom of the tape every two
feet of the length on the leading edge component
receiving tape.
NOTE
Varying widths of tape can be used depending of
the amount on leading edge to be covered.
c. Mask using above marks as guides.
Final sanding with anything coarser than A-A-
58054 Type I, Grade A abrasive (very fine 240-
320 grit) will adversely affect bond of tape.
d. Abrade the masked off area to a smooth surface using
A-A-58054 Type I Grade B followed by Grade A
abrasive mat.
e. Remove residue with cheesecloth moistened with TT-I-
735 isopropyl alcohol.
Do not use rented or polyester rags to apply
TT-I-735 alcohol as this may cause contamina-
tion of the surface.
f. Fill all seams and fastener heads with MIL-PRF-81733,
Type I, Class 2, Grade A sealant to eliminate any
possible air pockets behind the film, trowel smooth/flush
with razor blade or other suitable tool, and allow to cure
before proceeding.
g. Use CCC-C-440, Type I, Class 2 cheesecloth to apply
thin, but thorough coat of adhesion promoter per Table
6-2 to all application areas, including sealant, in the
masked off area used to smooth seams and fastener
heads.
h. Remove masking tape.
Table 6-2. Leading Edge Tape Materials/Tools
Material Source Use
Tape-width and color to match erosion
area to be covered
3M Industrial Specialties Division Leading edge rain erosion protection
Cage Code No. 52152
Clear Tape AF Supply Leading edge rain erosion protection
NSN 9330-01-338-9994
Adhesion Promoter 3M Company Promote tape adhesion
PN 86A (NSN 8040-01-448-4791,
Wipes 7’ x 7’) or (NSN 8040-01-
450-9187, Pint)
PN 70 0701-8275-6 (NSN 6850-01-
326-1607, Pint)
Edge Sealer 3M Company AF Supply Seal tape edges and fill fastener head
and other voids
PN Epoweld 8173A Double bubble
NSN 8040-00-092-2816
TO 1-1-8
6-24 Change 3