(6)
Pull panel aft-and lower left side first to remove panel.
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G. Remove Panel No. 5
(1)
Remove forward galley No. 1 (Ref 25-31-51, Removal/Installation).
(2)
From underside of panel, remove quick-release fasteners along forward edge.
(3)
Pull panel inboard to release outboard panel edge from trim strips.
(4)
Connect exhaust air hose to forward galley exhaust air inlet and tighten hose clamp.
(5)
Install forward galley No. 2 or forward right windscreen, as applicable (Ref 25-31-51, Removal/Installation, or 25-24-123, Removal/Installation).
3. Install Forward Lowered Ceiling Panels (Fig. 401)
A. Install Panel No. 5
(1)
Insert outboard edge of panel into trim strips on sidewall.
(2)
Install quick-release fasteners along forward edge.
(3)
Install forward galley No. 1 (Ref 25-31-51, Removal/Installation).
B. Install Panel No. 4
(1)
With panel No. 4 raised and slightly aft of its installed position, work panel forward until correctly located.
(2)
Reach through access door opening and install fasteners through support brackets at forward corners of panel and along left edge.
(3)
Install screws attaching support bracket on right edge of panel.
(4)
Install screws attaching trim strip to right side of the aft edge of panel No. 4.
(5)
Install screws attaching clip to the aft left corner of panel No. 4.
(6)
Close access door in panel No. 4.
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C. Install Panel No. 3
(1)
Insert forward edge of panel into interior lining trim attachments and slide panel outboard to engage outboard edge with sidewall trim.
(2)
Install fasteners at inboard edge of panel.
(3)
Install exit light lens over forward service door.
D. Install Panel No. 2
(1)
Insert forward edge of panel into interior lining trim attachments and slide panel outboard to engage outboard edge with sidewall trim.
(2)
Install fasteners at inboard edge of panel.
(3)
Install forward service panel cover over forward entry door.
(a)
Attach service panel cover to hinges.
(b)
Install quick-release fasteners in upper corners of service panel cover.
(4)
Install forward airstair controls.
(a)
Ensure that forward airstair controls circuit breaker on circuit breaker panel P6 is open.
(b)
Insert controls casing through cutout in lowered ceiling panel and thread electrical wires through grommet in casing.
(c)
Install screws attaching casing to frame structure.
(d)
Insert controls, attached to faceplate, into casing and connect wiring as required.
(e)
Install screws attaching faceplate to controls casing.
(f)
Close forward airstair controls circuit breaker on panel P6.
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E. Install Lowered Ceiling End Cap
(1)
Place outboard panels of end cap in position and move inboard to engage inboard edges with air conditioning outlet nozzle.
(2)
Support outboard panels and install fasteners to secure outboard attaching brackets to overhead support structure.
(3)
Install two screws to attach support brackets to structure near inboard edge of each outboard panel.
(4)
Install fastener to connect left outboard end cap panel to panel No. 2.
(5)
Support center panel of end cap in position with an equal gap on each side between outboard panels and secure with eight attaching screws.
(6)
Install two screws to secure exit light to brackets on center panel.
(7)
Connect wire bundle to emergency exit light on center panel.
(8)
Connect fabric fire barrier installed above ceiling panels by pressing together halves of velcro tape on barrier and end cap.
(9)
Raise curved ceiling panels installed adjacent to lowered ceiling end cap. Refer to 25-21-341, Curved Ceiling Panel - Maintenance Practices.
(10)
Close emergency exit light circuit breakers opened during removal of lowered ceiling end cap.
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