Technical data

(5) Apply topcoat to the fuselage aft section starting at
the wing trailing edge and the top moving aft and
down to the aft end with the initial stroke perpen-
dicular to the aircraft length. Apply the criteria in
Paragraph 5.6.1.1 step b (1). Topcoat any aft fuselage
mounted engine nacelles using the same techniques
at this time.
(6) Apply topcoat to the horizontal stabilizer upper
surface on “T” tail aircraft starting at the center and
moving toward the tip with the initial stroke perpen-
dicular to the leading edge, and then topcoat the
horizontal stabilizer lower surface starting at the tip
moving inboard to the junction with the vertical
stabilizer. Topcoat each side of the vertical stabiliz-
er(s) on “T” tail aircraft next starting at the top and
the leading edge moving down and aft to the junction
with the fuselage with the initial stroke in a vertical
direction. Topcoat the front of the leading edge of the
vertical stabilizer(s) starting at the top moving down-
ward. Topcoat any vertical stabilizer mounted engine
nacelles using the same techniques at this time.
Apply the criteria in Paragraph 5.6.1.1 step b (1).
Bottom mounted horizontal stabilizer aircraft are
topcoated using the same techniques except the
vertical stabilizer(s) are topcoated first.
5.6.1.2 Large aircraft-nose toward hanger exhaust.
a. Priming. Apply primer using the same techniques as for
small aircraft with tail toward the exhaust except reverse
the order of areas being primed, i.e. prime from the nose
working toward the tail.
b. Topcoating. Apply topcoat using the same techniques as
for small aircraft with tail toward the exhaust except
reverse the order of areas being topcoated, i.e. topcoat
from the tail working toward the nose.
5.6.1.3 Walkway Coatings. Specialty walkway coat-
ings applied to the upper wing main gear pods, upper
fuselage, and horizontal stabilizer: surfaces should be applied
before topcoating the aircraft. Any masking for walkway
areas should then be removed and the aircraft should then be
topcoated while the walkway coating is curing. If any
anti-slip grit is added to the topcoat material for application to
walkway areas, the above does not apply; and the walkway
areas should be coated with topcoat material to which
anti-slip grit is added as the second topcoat for these areas.
5.6.2 Overspraying Existing Coating Systems On
Aircraft and Aerospace Equipment. It is always better to
start a paint system from bare metal; however, it is feasible to
overspray existing paint systems. For aircraft, this must be
authorized by Chapter 8 of this manual or the weapon system
specific technical orders.
NOTE
Adhesion failure between coatings requires com-
plete removal of the nonadhering coating. When
intercoat adhesion failure occurs over large areas,
overcoating shall not be accomplished, and com-
plete strip/repaint is required. Refer to Chapter 2
of this technical order for removal.
a. Clean, mask, scuff sand, and vacuum surface to be
overcoated per Paragraph 3.1.3 of this technical order.
b. Apply conversion coating to repair bare aluminum
surfaces per Chapter 3 of this technical order.
c. Allow at least 2 hours for the conversion coating to dry
and set up. Aircraft requiring movement to a paint
hangar must be moved with minimal delay in the outside
environment.
d. After the aircraft or equipment is situated in the paint
facility, or after 2 hours minimum has elapsed since
applying the conversion coating to the aircraft, solvent
wipe the entire aircraft surface per Paragraph 3.1.4 of
this technical order.
NOTE
If the aircraft was not prepared in the paint
hangar and was moved to the paint hangar after
scuff sanding, the aircraft must be allowed to dry
(if necessary) and the aircraft skin to warm to
room temperature before final solvent wipe and
before conversion coating application if not al-
ready done.
TO 1-1-8
5-9