(2)  
Open appropriate circuit breakers and disconnect electrical leads to speaker and call light on panel No. 1.

(3)  
Detach lowered ceiling panel from hinges.

C.  Remove Panel No. 2
(1)  
Remove curtain track from panel (when installed).

(2)  
Open panel by releasing the two latches.

(3)  
Remove battery power pack from panel.

(4)  
support panel and detach panel hinges.

D.  Remove Panel No. 11
(1)  
Remove fasteners at inboard and forward edges.

(2)  
Disconnect support bracket from overhead support structure.

(3)  
Pull panel inboard releasing panel from sidewall, trim attachment.

E.  Remove panel No. 5
(1)  
Remove fasteners from bracket which connects panel No. 5 to panel No. 6.

(2)  
Support panel No. 5 and remove fasteners along inboard edge.

(3)  
Support panel and disconnect support brackets from overhead support structure.

(4)  
Lower and remove ceiling panel.

F.  Remove Lowered Ceiling End Cap
(1)  
Lower curved ceiling panels installed adjacent to lowered ceiling end cap (Ref 25-21-341, Maintenance Practices).

(2)  
Open appropriate circuit breakers and disconnect wire bundle from emergency light.

(3)  
Remove emergency exit light.

(4)  
Remove three screws attaching each top panel to end cap support channel and remove both top panels.

(5)  
Support end cap and remove screws and washers attaching each outboard panel to overhead support structure.

(6)  
Lower and remove end cap.

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G.  Remove Panel No. 3
(1)  
Remove forward service panel cover over forward entry door.

(a)  
Remove quick-release fasteners in upper corners of service panel cover.

(b)  
Remove screws attaching service panel cover to hinges at bottom corners of panel.

(2)  
Remove forward airstair controls.

(a)  
Open circuit breaker to forward airstair controls on circuit breaker panel P6.

(b)  
Remove two screws attaching faceplate to controls casing and pull faceplate with attachments inboard through cutout in lowered ceiling panel.

(c)  
Disconnect wiring as required and completely remove airstair controls.

(d)  
Remove screws attaching controls casing to frame structure and remove casing.

(3)  
Remove fasteners at aft and inboard edges of panel No. 3.

(4)  
Pull panel inboard to release outboard edge and then aft to release forward edge.

577 
Nov 15/78  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  25-21-351 Page 403 

H.  Remove Panel No. 4
(1)  
Remove fasteners at inboard edge.

(2)  
Pull panel inboard and aft to release outboard and forward edges.

I.  Remove Panel No. 6
(1)  
Remove exit light lens above forward service door.

(2)  
Remove forward right windscreen (Ref 25-24-123).

(3)  
Loosen hose clamp on exhaust air hose and disconnect hose from galley exhaust air inlet.

(4)  
Release fasteners along inboard edge of panel.

(5)  
Pull panel inboard and aft to release forward and outboard edges.

J.  Remove Panel No. 9
(1)  
Open access door in panel No. 9.

(2)  
Remove screws attaching clip to aft left corner of panel No. 9.

(3)  
Remove screws attaching trim strip to right side of the aft edge of panel No. 9.

(4)  
Reach through access door opening and remove screws attaching support bracket to panel on right side of panel.

(5)  
Remove fasteners through support brackets along left edge and in forward corners of panel.

(6)  
Pull panel aft and lower left side first to remove panel.

5A2 
25-21-351 Page 404  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Feb 15/81 

K.  Remove Panel No. 10
(1)  
Remove galley No. 1 (Ref 25-31-51).

(2)  
From underside of panel, remove quick-release fasteners along forward edge.

(3)  
Pull panel inboard to release outboard and aft panel edges from trim strips.
　
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