(4)  
Install fasteners in bracket which connects panel No. 5 to panel No. 6.

(5)  
Check that flaps along edges of curved portion of panel are overlapping adjacent panels properly.

(6)  
Close overhead stowage compartment beneath ceiling panel.

548 
May 01/76  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  25-21-351 Page 407 

H. Install Panel No. 11
(1)
Insert outboard edge of panel into interior lining trim attachment.

(2)
Secure support bracket to overhead support structure.

(3)
Install fasteners at inboard and forward edges.

I. Install Panel No. 2
(1)
Attach panel hinges to support structure.

(2)
Install battery power pack on panel.

(3)
Hinge panel up and engage the two latches.

525 
25-21-351 Page 408  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Aug 1/74 

J.  Install Panel No. 1
(1)  
Attach lowered ceiling panel to hinges.

(2)  
Connect electrical leads to speaker and call light on panel No. 1.

(3)  
Hinge lowered ceiling panel up to engage the two latches.

K.  Install Panels No. 7 and 8
(1)  
Open overhead stowage compartment beneath ceiling panel to be installed.

(2)  
Remove hinge spring pin from trunnion on each outboard latch.

(3)  
Support ceiling panel with hinge bases on outboard edge aligned with trunnion on each outboard latch.

(4)  
At each latch, push hinge spring pin through hinge base and trunnion.

(5)  
Hook lanyard through hole in ceiling support structure and connect wire bundle at bracket containing receptacle.

(6)  
Move ceiling panel outboard and raise inboard edge to engage support angle on structure. Stow excess length of lanyard on top of panel so that lanyard does not wedge between panel and support angle.

(7)  
Move ceiling panel inboard to push support angle under latch plates on inboard edge of panel.

(8)  
Push up on outboard edge of panel to lock both outboard latches.

(9)  
Check that flaps along edges of curved portion of panel are overlapping adjacent panels properly.

(10)
Raise compartment door and insert hinge pins (Ref 25-24-511, Maintenance Practices).

(11)
Close ceiling light circuit breakers on panel P18 and check that lights operate properly.

577 
Nov 15/78  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  25-21-351 Page 409 

K90518
Forward Lowered Ceiling Installation  5C8 
25-21-351  Figure 401 (Sheet 1)  Jan 20/83 
Page 410 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

504  Forward Lowered Ceiling Installation 
Aug 15/78  Figure 401 (Sheet 2)  25-21-351 
Page 411 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

Forward Lowered Ceiling Installation  533 
25-21-351  Figure 401 (Sheet 3)  Feb 15/72 
Page 412 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

527  Forward Lowered Ceiling Installation 
Feb 15/72  Figure 401 (Sheet 4)  25-21-351 
Page 413 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

Forward Lowered Ceiling Installation  527 
25-21-351  Figure 401 (Sheet 5)  Feb 15/72 
Page 414 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

533  Forward Lowered Ceiling Installation 
Feb 15/72  Figure 401 (Sheet 6)  25-21-351 
Page 415 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

Forward Lowered Ceiling Installation  540 
25-21-351  Figure 401 (Sheet 7)  Feb 01/74 
Page 416 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

FORWARD LOWERED CEILING PANELS - REMOVAL/INSTALLATION
EFFECTIVITY
Passenger/Cargo Convertible Airplanes
1.  General
A.  The forward lowered ceiling comprises individual panels as described in this section. The panels are arbitrarily assigned numbers, as shown in figure 401, to assist in identification within these procedures only.
　
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