(c)  
Turn the handle counterclockwise to open it.

 S 494-004
 WARNING: YOU MUST INSTALL THE SAFETY GUARD AROUND THE AREAS THAT HAVE
_______ THE OPENING IN THE FLOOR. IF IT IS NOT INSTALLED, PERSONS CAN ACCIDENTALLY FALL INTO THE OPENING AND BECOME INJURED.
 (3)  
Install the safety guard of the E/E access opening around the opening you can see in the floor.

 S 024-018

 (4)
You will do this step to remove the safety net (if installed):

 (a)  Open the safety net on one (1) side by releasing the spring loaded strap fitting.
 TASK 53-21-05-404-005
 3. E/E Bay Access Panel Installation (Fig. 401 and 402)
 A. References
 (1)  
AMM 12-21-04/301, Door

 (2)  
AMM 25-27-01/401, Main Deck Floor Covering

 (3)  
AIPC 53-21-75, Fig. 2

 B. Access
 (1)  Location Zone 212 Forward Cabin, Nose to Body Station 450.
 C. Procedure
 S 424-019
 (1)
You will do this step to install the safety net (if attached):

 (a)  Install the safety net by closing the spring loaded strap fitting.

 (2)  
Lubricate the panel latch mechanism (AMM 12-21-04/301).

 S 424-007

 (3)  
Install the Panel

 (a)  
Remove the safety guard of the E/E bay access opening.

 (b)  
Put the panel in the correct position.

 (c)  
Turn the handle clockwise to lock.

 (d)  
Push the handle until it is level.

 S 644-006
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 414-008
 (4) Install the carpet (AMM 25-27-01/401).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 INFLIGHT DEPRESSURIZATION BLOWOUT PANELS - INSPECTION/CHECK
___________________________________________________________
 1.  General_______
 A.  This procedure has one task. This task gives instructions to examine the depressurization blowout panels installed on the floor.
 B.  Before the blowout panels disengage, they must operate smoothly. When these panels operate, they must not touch the structure, the equipment, or an operated system.
 TASK 53-21-07-716-001
 2.  Inflight Depressurization Blowout Panels Inspection (Fig. 601)___________________________________________________
 A.  Access
 (1)  Location Zones 211 Passenger Cabin - Nose to First Door, Left 212 Passenger Cabin - Nose to First Door, Right 231 Passenger Cabin - First to Second Door, Left 232 Passenger Cabin - First to Second Door, Right
 B.  Procedure
 S 716-005
 (1)  Examine the blowout panel operation:
 (a)  
Push down on the blowout panel through the protective cage.

 (b)  
Make sure the panel springs disengage easily.

 NOTE:____The panel will fall into the lower compartment. An irregular shape of the springs will not let them disengage easily.

 (c)  
Replace the springs, if it is necessary, when they are irregular in shape. 1) Push down on the blowout panel through the protective cage. 2) Make sure the panel springs disengage easily.

 (d)  
When the blowout panel is not serviceable or is defective, examine the adjacent blowout panels for the correct operation.

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