527  Insulation Blankets Details 
Oct 20/87  Figure 801 (Sheet 1) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  25-21-339 Page 803 

Insulating Blankets Details  527 
25-21-339  Figure 801 (Sheet 2)  Oct 20/87 
Page 804 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

NOTE: To facilitate sealing, cement may be thinned with methyl ethyl ketone.
C.  Install New Insulation Blanket
(1)  
For installation of sidewall insulation blanket, refer to 25-21-339 R/I.

(2)  
For installation of ceiling insulation blanket, refer to 25-21-349 R/I.

527 
Oct 20/87  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  25-21-339 Page 805 

CURVED CEILING PANEL - MAINTENANCE PRACTICES
EFFECTIVITY
Wide-Body Look and Carry-All Compartment Interior
1.  General
A.  Curved ceiling panel instructions covered in this section include, lowering and raising for service access, removal/installation, and inspection/check.
B.  On passenger/cargo convertible airplanes, a fabric fire barrier is attached with velcro tape to the top surface of the left and right curved ceiling panels located adjacent to the forward edge of the main cargo door. Before lowering these two panels it is necessary to disconnect the fore barrier from the ceiling panels.
2.  Lower and Raise Curved Ceiling Panel
A.  Lower Curved Ceiling Panel (Fig. 201)
(1)  
If an emergency exit light is installed on air conditioning ceiling outlet under the ceiling panel, remove exit light lens and shroud (Ref Chapter 33, Emergency Lights).

(2)  
On airplanes with Wide-Body Look Interior, open overhead stowage compartment beneath ceiling panel to be lowered.

(3)  
On airplanes with Carry-All Compartment Interior, lower compartment door (Ref 25-24-511).

(4)  
Push up on the latch trigger of each outboard latch and allow outboard side of ceiling panel to move down.

(5)  
Support inboard edge and move ceiling panel outboard until inboard edge is free of air conditioning outlet nozzle.

(6)  
Allow ceiling panel to swing down until it is held by the two lanyards.

(7)  
Disconnect hook on each lanyard from lanyard brackets on ceiling panel and allow panel to swing down until it is again held by the two lanyards.

B.  Raise Curved Ceiling Panel (Fig. 201)
(1)  
Raise ceiling panel and attach lanyard hooks to the lanyard attaching brackets.

(2)  
Move ceiling panel outboard and raise inboard edge to engage air conditioning outlet nozzle.

NOTE:  Excess length of lanyard should be stowed along edge of ceiling panel so as not to wedge between panel and air conditioning outlet nozzle.

(3)  
Move panel inboard to push inboard edge into air conditioning outlet nozzle and push up on outboard edge to lock both outboard latches.

(4)  
Check that flaps along edges of ceiling panels are overlapping adjacent panels properly.

(5)  
On airplanes with Wide-Body Look Interior, close overhead stowage compartment beneath ceiling panel.

(6)  
On airplanes with Carry-All Compartment Interior, raise compartment door and insert hinge pins (Ref. 25-24-511).

(7)  
Install emergency exit light lens and shroud if they were removed to allow lowering of ceiling panel (Ref Chapter 33, Emergency Lights).

5C8
Jun 20/85 25-21-341 Page 201
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

3.  Removal/Installation Curved Ceiling Panel

A.  Remove Curved Ceiling Panel (Fig. 201)
(1)  
Lower ceiling panel as described in Curved Ceiling Panel - Maintenance Practices. If desired, lower two adjacent panels for access.

(2)  
Open the following circuit breakers on panel P18:

(a)  
NIGHT LIGHTS (2 places)

(b)  
LEFT AFT PWR

(c)  
RIGHT AFT PWR

(d)  
RIGHT AND LEFT FWD PWR

(3)  
If removing a ceiling panel containing ceiling lights, disconnect ceiling panel wire bundle at bracket installed on structure above ceiling panel. Install stowage cap to open receptacle on bracket.

(4)  
Support ceiling panel and remove screw attaching each lanyard terminal to bracket on air conditioning duct.

(5)  
Support ceiling panel and remove hinge spring pin from both ceiling panel latches.

(6)  
Lower and remove ceiling panel.

(7)  
　
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