MD Helicopters 369 Series, Manual

Page: 69 / 110

CSP−HMI−2
MD Helicopters, Inc
.
MAINTENANCE MANUAL
53−40−30
Page 211
Revision 39
(21). Check rigging of vertical stabilizers
(Ref. Sec. 67−20−30).
13. 500N3500 − 5 Cover Installation
(Ref. Figure 204) New tailbooms come with the
500N3500−5 cover separate. This cover must
be bonded in place after the wiring and cables
are installed.
Consumable Materials
(Ref. Section 91 − 00 − 00)
Item Nomenclature
CM222 1,1,1−Trichloroethane
CM410 Adhesive, epoxy (parts A & B)
CM802 Abrasive cloth, aluminum oxide
CM819 Kimwipe
(1). With cutout facing down and forward,
gently role cover to shape of tailboom
and position inside aft end of tailboom.
Slide cover in until aft end is flush with
tailboom.
NOTE:
Right edge of cover should be just to the
right of the torque tube housing (8
°
to the
right of centerline). Left edge should be un-
der the left horizontal stabilizer empennage
fitting.
(2). Check holes in cover to ensure they line
up with electrical connectors on
tailboom.
(3). If holes do not line up with electrical
connectors, remove cover, role 180
°
and
reposition in tailboom.
NOTE:
Tailboom is manufactured with 1.0 x 1.0
inch (25.4 x 25.4 mm) spots marked for
abrasion.
(a). If tailboom is not previously marked,
place a mark every 2.0 inches (50.8
mm) around cover and tailboom.
(b). Do not bond the bottom 8.0 inches
(203.2 mm) on aft end of cover.
(4). Abrade around the cover mating
surface with 240 grit abrasive cloth
(CM802) to remove gloss.
NOTE:
D
Use care to avoid damage to the fiber re-
inforcement.
D
Metallic faying surfaces do not require
abrading.
(5). Using 240 grit abrasive cloth (CM802),
lightly abrade spots, where marked,
around the tailboom until the surface
gloss is removed.
(6). Wipe abraded surfaces with kimwipes
(CM819) dampened with
1,1,1−Trichloroethane (CM222). Allow
to air dry for 15 minutes.
(7). Mix adhesive according to manufactur-
er’s instructions.
NOTE:
Adhesive must be applied within two
hours of cleaning. Repeat solvent prep if
more than two hours elapses before bond-
ing.
(8). Apply adhesive to abraded areas and
position cover in tailboom. Clean up
excessive adhesive.
(9). Allow to cure per manufacturer’s
instructions.