Eagle ICA-D212-725, Instructions Manual

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ICA-D212-725 (52
)
Page 6 of 54
CHAPTER 52 – DOORS AND WINDOWS (52-00-00)
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COPYRIGHT

2007 BY DART AEROSPACE LTD.

THIS DOCUMENT IS PRIVATE AND CONFIDENTIAL AND IS SUPPLIED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED FOR ANY PURPOSE OR COPIED OR COMMUNICATED TO
ANY OTHER PERSON WITHOUT WRITTEN PERMISSION FROM DART AEROSPACE LTD.
Revision: 4
Date: 11.06.01
52.1 DOORS
This chapter provides maintenance data for crew
doors, passenger/cargo doors, access doors and
panels, tail rotor driveshaft covers, and
windshields and windows.
52.1.1 General Maintenance Practices
52.1.2 Seal Replacement – Access Doors,
Panels, Cowlings, Fairings and Covers
MATERIALS REQUIRED
NUMBER NOMENCLATURE
C-300 Adhesive
C-309 Methyl-Ethyl-Ketone
(MEK)
C-311 Adhesive
C-423
Abrasive Cloth or Paper
NOTE
Seals may be either rubber or silicone
composition. Bonding procedure is different for
each type. Seals subjected to fuel or oil
contamination (used in the pylon transmission and
engine compartment) should be of polysulfide or
neoprene (rubber type).
52.1.2.1
Determine type of seal being replaced
by cutting a small specimen from damaged seal
and subjecting it to flame. Silicone seals are more
rapidly affected by flame and will leave a gray ash
residue. Rubber type seals are much more fire
resistant and will leave a black ash residue.
52.1.2.2
Remove all paint and primer from
metal surface where seal is to be applied.
52.1.2.3
Clean new seal and the metal where
seal is to be applied with MEK (C-309) or
equivalent and dry with clean, lint-free cloths.
NOTE
It is necessary to thoroughly clean surfaces
before sanding to preclude working any foreign
matter into pores of material.
52.1.2.4
Sand mating surfaces of seal and
metal with 180 grit abrasive cloth or paper (C-
423).
52.1.2.5
Clean sanded surfaces with MEK
(C-309) and dry with a clean, lint-free cloth.
52.1.2.6
Bond rubber type (black ash) seals
as follows:
52.1.2.6.1 Apply an even coat of adhesive (0-
311) to mating surfaces of seal and metal.
52.1.2.6.2 Allow adhesive to air dry 10 to 15
minutes at 75°F (24°C) or above. Adhesive
should be aggressively tacky and adhere (but
not transfer to) finger when touched.
52.1.2.6.3 Repeat preceding steps 53.1.2.6.1
and 52.1.2.6.2 Second coat is mandatory to
obtain good adhesion.
52.1.2.6.4 Start at one end and roll on seal.
Press seal down to expel all air to ensure proper
contact and adhesion.
52.1.2.6.5 Air cure for a minimum of 4 hours at
75°F (24°C) or above.
52.1.2.7 Bond silicone composition (gray
ash) seals as follows:
CAUTION
DO NOT CAP ADHESIVE AFTER MIXTURE.
MIXTURE RELEASES HYDROGEN GAS
WHICH CAN CAUSE HIGH PRESSURES.
POT LIFE OF THIS ADHESIVE IS 6 HOURS.