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 B.  Section 42 contains supports for lights and switches, racks for the center equipment bay, and supports for additional antennas (VHF, Satellite Communication, ATC, DME).
 C.  Supports in section 44 are for equipment concerning the main gear such as service lights and uplock and door warning switches. Additional supports are for the VHF and ADF antennas and emergency lights for the overwing exits.
 D.  Section 46 contains supports for service lights, emergency lights, APU battery, and E8 rack.
 E.  Equipment supported in section 48 includes APU service light, and tail cone service light and switch.
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 53-41-00
 ALL  ú ú 01 Page 1 ú Jun 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 INTERIOR EQUIPMENT SUPPORTS AND FITTINGS - DESCRIPTION AND OPERATION
____________________________________________________________________
 1.  General_______
 A.  Interior equipment supports and fittings are those attachments for the seats, lavatory modules, galleys, and other components that are not electrical or electronic equipment.
 2.  Seat Attachment Fittings________________________
 A.  Eight seat tracks extend nearly the full length of the main deck. Only in the forward and aft ends is the quantity of seat tracks reduced to accommodate the tapered area of the fuselage. Four seat tracks in the upper deck area extend from the forward to the aft end. The seat tracks are attached to the tops of the floor beams or except over the wing center section where they are integral with the floor beams. The seat tracks allow seats in the upper deck to be installed at any of the locations provided in the tracks. The tracks in the upper deck also support the lavatory modules, galleys, and other equipment.
 B.  All flight crew seats are attached to special seat tracks which provide for movement of the seats in directions required for access or adjustment.
 3.  Miscellaneous Equipment Attach Fittings_______________________________________
 A.  Fittings are provided on the fuselage structure for attachment of air conditioning equipment, lavatory equipment, water tanks, safety equipment (slides, ladders, etc.), and oxygen equipment.
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 53-42-00
 ALL  ú ú 05 Page 1 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 UPPER DECK SEAT/FLOOR TRACKS - INSPECTION CHECK
_______________________________________________
 1.  General_______
 A.  This procedure has one task. The task gives instructions to examine the upper deck and main deck seat tracks.
 (1) You must do these steps to examine the seat/floor tracks:
 (a)  
Remove the passenger seats

 (b)  
Remove the main deck cargo equipment.

 (c)  
Do a visual inspection of the main deck floor track and the upper deck seat track.

 (d)  
Install the passenger seats.

 (e)  
Install the main deck cargo equipment.

 TASK 53-42-01-536-006
 2.  Upper Deck Seat and Main Deck Floor Tracks Inspection_____________________________________________________
 A.  References
 (1)  
AMM 25-25-01/401, Seat Track Removal/Installation

 (2)  
AMM 53-42-01/701, Cleaning and Painting

 B.  Access
 (1)  Location Zone
 200 Passenger Cabin - Main and Upper Deck

 C.  Procedure
 S 016-007
 (1)  
Remove the main deck cargo equipment.

 S 016-002

 (2)  
Remove the passenger seats (AMM 25-25-01/401).

 S 216-009

 (3)  
Examine the seat and floor tracks as follows:

 (a)  
Examine the seat and floor tracks for cracks, corrosion, damage, and loose fasteners.

 (b)  
Clean or paint the seat and floor tracks when it is necessary (AMM 53-42-01/701).

 

 D.  Put the Airplane to Its Usual Condition
　
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