S 022-007

 (4)
Remove the valve door from the airplane skin.

 S 032-008

 (5)
Remove the seal from the pan assembly.

 S 032-009

 (6)
Remove the spring from the valve door.

 (a)
Remove the retaining bolt.

 (b)
Remove the spring support retainer.

 (c)
Hold the spring tightly and remove the spring support rod.

 (d)
Remove the spring from the valve door and let it unwind slowly.

 TASK 21-32-02-402-008
 3.  Install the Relief Valve (Fig. 201)________________________
 A. Consumable Materials
 (1)
A00247 - Sealant, BMS 5-95, Type B

 B.
References

 (1)
AMM 06-41-00/201, Fuselage Access Doors and Panels

 C.
Access

 (1)  
Location Zones
 120 Main equipment center (Right)

 D.
Install the Valve

 S 432-009
 (1)
Put the spring onto the valve door.

 (a)
Put the spring onto the support rod.

 (b)
Wind the spring approximately 235°.

 (c)
Put the end of the spring into the hole in the valve door.

 (d)
Let the other end of the spring rest against the valve door.

 (e)
Put the spring support retainer into position.

 (f)
Install the retaining bolt, the washer, and the nut.

 (2)
Put a new seal into the pan assembly.

 S 422-011

 (3)
Install the valve door into the pan assembly:

 (a)
Put the valve door into position in the pan assembly.

 (b)
Put the end of the spring into the hole in the pan assembly.

 S 432-010
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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757 MAINTENANCE MANUAL
 (c)  Install the two hinge bolts as follows: 1) Install the bushings. 2) Install the bolts, washers and nuts. 3) Align the nuts as necessary and install the cotter pins.
 S 432-012
 (4)  
From the out side of the airplane, apply the sealant if there is any clearance between the pan assembly and the airplane skin.

 S 712-013

 (5)  
Push on the valve door to make sure it moves smoothly through the full travel of the door.

 E.
Put the Airplane Back to Its Usual Condition

 S 412-014
 (1)  
Install the sidewall panel in the main equipment center.

 S 412-015

 (2)  
Close the access door, 119BL, to the main equipment center (AMM 06-41-00/201).

 TASK 21-32-02-732-016
 4.  Do the Vacuum Pressure Relief Valve Test________________________________________
 A. Equipment
 (1)  
Push-type spring scale, range 0 to 20 lbs, commercially available.

 B.
Do the Relief Valve Test

 S 482-018
 (1)  Put the spring scale against the out side of the valve door so it is in the center of the door and 3.65 inches above the bottom edge of the door.
 S 732-017
 WARNING: WHEN YOU PUSH ON THE DOOR, MAKE SURE THE SPRING SCALE IS
_______ VERTICAL TO THE DOOR DURING THE FULL TRAVEL OF THE DOOR. IF THE SPRING SCALE IS NOT VERTICAL TO THE DOOR, IT COULD SLIP OFF THE DOOR AND CAUSE INJURY TO PERSONS.
 (2)  
Push the door with the spring scale so that there is a one-inch clearance at the bottom edge of the door.

 (3)  
Make sure the scale shows a force of 11.5 |1.5 pounds.

 S 732-020

 (4)  
Push the door with the spring scale until the door is 0.10 |0.08 inches from the door stop (65° open).

 (5)  
Make sure the scale shows a force of 16.0 |2.0 pounds.

 S 732-019
 S 732-025
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 ALL  ú ú 01 Page 204 ú May 20/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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