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MAINTENANCE MANUAL

 F.  The outboard trunnion support fitting is attached to the body station 1480 bulkhead and is stabilized by stiffeners between the inboard trunnion and itself (Detail E, Sheet 2). The trunnion support fittings are the major load carrying supports when the airplane is not airborne.
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747-400 MAINTENANCE MANUAL
 AERODYNAMIC FAIRINGS - DESCRIPTION AND OPERATION
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General (Fig. 1)
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 A.  Fairings provide aerodynamic smoothness for various areas to the wing-to-body join, to the leading edge of the vertical fin-to-fuselage join, and the forward and aft ends of the fuselage.
Wing-to-Body Fairings
_____________________
 A.  Wing-to-body fairings are attached to the wing surfaces and the fuselage skin to provide an aerodynamically smooth surface. They are of glass fabric sandwich construction with reinforced nomex honeycomb core. Aluminum frames are installed to support the fairing panels.
 B.  Equipment of all types is housed under the fairings; some antennas and lights are mounted directly to the fairings. Access to equipment beneath the fairings is attained either through specific doors or by removing a portion of the fairing (Ref 53-51-00).
Nose Radome
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 A.  The nose radome extends forward from fuselage station 134, serves as a fairing for the forward end of the fuselage, and houses the weather radar antenna. It is a cone-shaped structure of fiberglass honeycomb sandwich construction that is equipped with erosion and lightning protection. The nose radome pivots open to the left on upper and lower hinge arms and is secured in the closed position by six evenly spaced latches (Ref 53-52-00).
Dorsal Fin
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 A.  The dorsal fin is a fairing at the lower forward edge of the vertical fin. It fairs the upper surface of the fuselage with the leading edge of the vertical fin.
 B.  Construction is of formed clad aluminum skin with formed aluminum ribs at
 10.0 inch spacing.
 C.  Attachment is to the fuselage with a formed extruded angle. All edges of the fin are sealed (dorsal fin to fuselage and dorsal fin to vertical fin) with rubber extrusions (Ref 55-30-00).
Tail Cone Fairing (Fig. 2)
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 A.  The tail cone fairing forms the extreme aft portion of the fuselage and contains APU exhaust provisions.
 B.  Construction is of formed aluminum skin with a laminated fiberglass shroud.
 C.  Attachment of the tail cone fairing to fuselage rib at station 2775.3 is by standard rivets.
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NOSE RADOME

Aerodynamic Fairings
Figure 1

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(REF) (REF) STA STA 2658 2742

Tail Cone Fairing
Figure 2

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