MD Helicopters 369 Series, Manual

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CSP−HMI−2
MD Helicopters, Inc
.
MAINTENANCE MANUAL
Page 210
Revision 39
53−40−30
12. Horizontal Stabilizer Mount Fitting
Replacement
(Ref. Figure 201)
Empennage Fitting Part No.
L/H, Aluminum 500N3530 − 3, − 7
R/H, Aluminum 500N3530 − 4, − 8
L/H, CRES 500N3530 − 9
R/H, CRES 500N3530 − 10
Consumable Materials
(Ref. Section 91 − 00 − 00)
Item Nomenclature
CM101 Solid film lubricant
CM206 Chemical coating
CM222 1,1,1−Trichloroethane
CM304 Enamel, epoxy
CM315 Adhesive primer
CM318 Primer
CM418 Cement, epoxy
CM425 Sealing compound
CM801 Abrasive paper, silicon carbide
(1). Remove horizontal stabilizer (Ref. Sec.
53−50−30, Horizontal Stabilizer
Replacement).
(2). Remove rotating thruster cone (Ref.
Rotating Thruster Cone Replacement).
(3). Remove stationary thruster cone (Ref.
Stationary Thruster Cone
Replacement).
(4). Remove collars from pins in mount
fittings.
(5). Drive pins out of fittings.
Do not allow fittings to reach
200
°
F (94
°
C), damage to tail-
boom composite material will occur.
NOTE:
Heating the fitting to 150
°
F (66
°
C) may
assist in removing them from tailboom.
(6). Carefully pop fittings loose from
tailboom while not damaging fiberglass
sheets under fitting.
(7). Clean area with 1,1,1−Trichloroethane
(CM222).
(8). Locate new fitting on tailboom.
(9). Back−drill fittings to 0.186−0.188 inch
(4.724−4.775 mm).
(10). Remove fitting and deburr rivet holes.
(11). Touch up rivet holes with solid film
lubricant (CM101) for steel fittings or
chemical coating (CM206) for alumi-
num fittings.
(12). Steel fittings only:
(a). Using abrasive paper (CM801),
lightly abrade tailboom where fitting
is to be mounted.
(b). Clean fitting and tailboom abraded
area with 1,1,1−Trichloroethane
(CM222).
(c). Prime fitting with adhesive primer
(CM315).
(d). Apply a thin layer of cement (CM418)
between fitting and tailboom.
NOTE:
D
Use HTS12−6−4/−5 pin rivets with
HTS1176DU−6AWU collars or alternate
HTS48−6−4/−5 pin rivets with
HST2000−6AW collars.
D
Gage rivet holes to ensure proper length
pin rivets.
(13). Relocate fitting on tailboom and install
with pin rivets wet with primer
(CM318).
(14). Seal edges around fittings with sealing
compound (CM425).
(15). If installing steel fittings, prime with
adhesive primer (CM315).
(16). Touch up with paint (CM304).
(17). Reinstall stationary thruster cone (Ref.
Stationary Thruster Cone
Replacement).
(18). Reinstall rotating thruster cone (Ref.
Rotating Thruster Cone Replacement).
(19). Reinstall horizontal stabilizer (Ref. Sec.
53−50−30, Horizontal Stabilizer
Replacement).
(20). Check rigging of thruster (Ref. Sec.
67−20−30).
CAUTION