(2)
C00584 Primer - BMS 10-79, Type II
(3)
C00032 Enamel - Boeing color 7025 gray glass BMS 10-60
(4)
C00058 Conditioner - Surface Static, Magna 28-C-1
(5)
C00059 Surfacer - Magna, 9-W-5
(6)
C00313 Coating - Conductive, Desoto 3202009, Base
(7)
C00313 Coating - Conductive, Desoto 6108101, Catalyst
B. References
(1)
51-21-01/701, Interior and Exterior Finishes (Prepaint Cleaning and Pretreatment)
(2)
51-21-04/701, Alodized Surfaces
(3)
51-24-03/701, Conductive Coating System for Exterior Fiberglass
(4)
51-24-11/701, Decorative Paint System
(5)
SRM 51-70-14, Typical Fiberglass-Cloth Reinforced Plastic Repair
C. Access
(1) Location Zones 191 Fairing - Wing-to-Body, Forward, Lower Half, Left 192 Fairing - Wing-to-Body, Forward, Lower Half, Right 193 Fairing - Wing-to-Body, Aft, Lower Half, Left 194 Fairing - Wing-to-Body, Aft, Lower Half, Right 291 Fairing - Wing-to-Body, Forward, Upper Half, Left 292 Fairing - Wing-to-Body, Forward, Upper Half, Right 293 Fairing - Wing-to-Body, Aft, Upper Half, Left 294 Fairing - Wing-to-Body, Aft, Upper Half, Right
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D. Paint the Underwing Wing-to-Body Fairings
S 117-002
(1)
Clean the wing-to-body fairing (Ref 51-21-02/701).
S 377-003
(2)
Repair the aluminum flame spray (SRM 51-70-14).
S 377-004
(3)
Apply the clear alodine to the flame spray (Ref 51-21-04/701).
S 377-005
(4)
Apply the primer (Ref 51-24-11/701).
S 377-006
(5)
Apply the polyurethane enamel (Ref 51-24-11/701).
E. Paint the Overwing Wing-to-Body Fairing
S 117-007
(1)
Clean the wing-to-body fairing (Ref 51-21-02/701).
S 377-008
(2)
Apply the conditioner and the conductive coating (Ref 51-24-03/701).
(3)
Apply the primer (Ref 51-24-11/701).
(4)
Apply the polyurethane enamel (Ref 51-24-11/701).
S 377-009
S 377-010
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NOSE RADOME - DESCRIPTION AND OPERATION
_______________________________________
1. General (Fig. 1)_______
A. The nose radome is a fairing that extends forward from body station 134. Its functions are to house the weather radar antenna and to fair in the forward end of the fuselage.
B. The cone-shaped nose radome is constructed of preimpregnated epoxy resin glass fabric material forming inner and outer skins with a honeycomb core. The exterior finish is an erosion-resistant coating.
C. Twenty-four alignment fittings distributed about the aft periphery of the radome provide for adjustment of the radome to fuselage gap and mismatch. Each alignment fitting roller on the radome nests in a mating fitting on the forward bulkhead ring. Six hook-and-eye bolt latches are distributed among the alignment fittings. These latches secure the radome in the closed position.
D. The radome pivots on upper and lower hinge arms attached to the left side of the bulkhead. Upper and lower guide links control the radome rotation allowing it to pivot slightly forward, then to the left and aft until the hinge arms strike the rubber bumpers attached to the bulkhead. Snubbers restrict any quick movement of the radome. Quick-release pins installed in hold-open fittings on the bulkhead and the hinge arms secures the radome in the open position.
E. Aluminum diverter strips, installed longitudinally on the radome exterior, provide the radome with lightning strike protection. They extend approximately over the aft two-thirds of the radome surface. A conductor strap makes contact with the diverter strip and conductor spring on the inside of the radome. The conductor spring contacts a channel on the forward fuselage bulkhead, completing the grounding circuit from the diverter strip to the fuselage structure. The faying surfaces of the diverter strip, conductor strap, conductor spring, and the bulkhead conductor channel should remain unpainted and clean. The conductor spring must make positive contact with the channel on the bulkhead when the radome is closed.
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