(8)
If required for replacement, remove ceiling panel latch.
(a)
Remove two attaching screws securing panel latch to structure.
(b)
Remove ceiling panel latch.
B. Install Curved Ceiling Panel (Fig. 201)
(1)
If panel latches were removed during removal of ceiling panel, install the panel latches.
(a)
Support each panel latch in position on support angle on structure.
(b)
Install two attaching screws at each latch to secure latches to support angle.
(2)
Remove hinge spring pin from trunnion on each panel latch.
(3)
Support ceiling panel with hinge bases on outboard edge aligned with trunnion on each ceiling panel latch.
(4)
At each panel latch, push hinge spring pin through hinge base and trunnion.
NOTE: Access for insertion of hinge spring pins may be improved by having adjacent panels in lowered position.
(5)
Support inboard edge of ceiling panel and install quick-release fastener to attach each lanyard terminal to bracket on air conditioning duct.
(6)
If installing a ceiling panel containing ceiling lights, uncap electrical receptacle on structure above ceiling panel and connect ceiling panel wire bundle. Install stowage cap on dummy receptacle provided adjacent to electrical receptacle.
(7)
If panel latches were removed or if a new ceiling panel is being installed, adjust ceiling panel as described in par. 4.
(8)
Raise ceiling panel as described in par. 2.
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515 Curved Ceiling Panel Lowering
May 15/79 Figure 201 (Sheet 1) 25-21-341
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Curved Ceiling Panel Lowering 515
25-21-341 Figure 201 (Sheet 2) Aug 15/79
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531 Curved Ceiling Panel Installation Passenger Areas
May 15/77 Figure 201 (Sheet 3) 25-21-341
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Curved Ceiling Panel Lowering 515
25-21-341 Figure 201 (Sheet 4) May 15/79
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4. Adjustment/Test Curved Ceiling Panels
A. Adjust Curved Ceiling Panels Passenger Areas (Fig. 202)
(1)
Open overhead stowage compartment beneath ceiling panel to be adjusted.
(2)
Lower ceiling panel as described in par. 2.
(3)
Loosen screws attaching both outboard latches to support angle.
(4)
Slide ceiling panel forward or aft as required to provide a gap between adjacent panels of
0.75 士0.10 inch.
(5)
Move outboard edge of ceiling panel up or down as required to align surfaces of ceiling panel and overhead stowage compartment.
(6)
Tighten screws to secure both outboard latches to support angle.
(7)
Rotate slide bolt in each outboard latch to provide a gap of 0.30士0.03 inch between ceiling panel and overhead stowage compartment.
NOTE: Ceiling panel should overlap edge of air conditioning outlet nozzle a minimum of
0.50 inch.
(8)
Raise ceiling panel as described in par. 2.
(9)
Close overhead stowage compartment beneath ceiling panel.
518 Curved Ceiling Panel Adjustment Passenger Areas
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2. Adjust Curved Ceiling Panel (Main Cargo Door Area - Passenger/Cargo Convertible Airplanes) (Fig. 202)
NOTE: The following instructions provide the steps necessary to adjust the curved ceiling panels which are supported by the hinged support structure in the main cargo door area.
A. Open overhead stowage compartments beneath ceiling panels along main cargo door.
B. Lower four ceiling panels along main cargo door as described in par. 2.
C. Loosen two screws attaching each panel outboard latch to support beam.
D. Raise ceiling panels to closed position as described in par. 2.
E. Slide ceiling panels forward or aft as necessary to provide a gap between adjacent panels of
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