TM-1-1500-344-23-2
AIRCRAFT VOLUME II
TECHNICAL MANUAL; CLEANING AND CORROSION CONTROL
APRIL 2009
TM-1-1500-344-23-2 - Page 141 of 240
7-25
NAVAIR 01-1A-509-2
TM 1-1500-344-23-2
15 April 2009
Figure 7-18. Sealing of Access Doors
Dry bay/other
access doors,
semi-permanent
fittings (fillet seal
after tightening
fasteners)
Fuel tank
access door
with "O" ring
(install "O" ring
and fillet seal)
Fuel tank
access door
without "O" ring
(seal faying
surfaces and
fillet seal)
1.
Install all fasteners wet with AMS 3284,
under head only
2.
Seal edge with AMS 3284 as shown below
AMS 3284
"O" Ring
AMS 3284
AMS 3284
7-9. REPAIR OF DAMAGED SEALANT
.
7-9.1. DAMAGED SEALANT. Many areas on aircraft
are sealed either at the factory or by Depots during
rework. Fresh sealant shall be applied whenever the
previously applied sealant is damaged. Remove the
damaged sealant with a plastic scraper or mechanical
sealant removal tool (paragraph 7-5.5.) and, if necessary,
prepare the metal surface in accordance with Chapter 5.
Slightly roughen a strip of the undamaged sealant
approximately one inch wide around the boundary of
the stripped area using an abrasive cloth and then clean
with solvent (AMS 3166 or approved equivalent) using
a clean cloth (AMS 3819) or cheesecloth (CCC-C-440).
Apply the new sealant by brush or spatula (see paragraph
7-7.5) onto smaller areas, or by spraying (see paragraph
7-7.6) onto larger areas. The new sealant should overlap
the existing coating onto the roughened area.
7-9.2. FORM-IN-PLACE SEALANT REPAIR. After
removal of all loose sealant material, thoroughly clean
the area to be resealed (see paragraph 7-7.1). Areas of
old seal to which new sealant will be added must be
cleaned and abraded using an abrasive mat or abrasive
cloth to expose a clean, fresh surface.
Sealing and Coating Compound
12
Corrosion Inhibiting
MIL-PRF-81733
a. Apply MIL-PRF-81733 Type II-1/2 or aircraft
specific sealant, preferably with a sealant gun. The new
sealant should match the configuration of the removed
sealant but should be of sufficient depth to ensure
contact with the mating surface.
b. Apply a very thin film of release agent (VV-P-236
or MIL-PRF-32033) to the nonstick mating surface and
close the access door.
c. Do not open the door for a minimum of 24 hours
or the published tack free time of the aircraft specific
sealant, if applied at 75
°
F (24
°
C) and 50% relative
humidity (RH).
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