2) Turn the shop aid with a wrench.
 NOTE: This turns the inlet.
____
 S 214-008
 (2)  
Do a check that the rollers on the arms turn freely.

 S 214-009

 (3)  
Do a check that the rollers on the panel turn freely.

 S 014-012

 (4)  
Do the steps that follow to remove the forward section of the modulation panel from the aft section:

 (a)
Remove the eight bolts, nuts and washers from the hinge.

 (b)
Move the forward section of the modulation panel aft.

 (c)
Remove the forward section of the modulation panel.

 E. Install the Modulation Panel
 S 424-013
 (1)  Do the steps that follow to install the modulation panel in the ram air inlet:
 (a)  
Do these steps to install the aft section of the modulation panel in the ram air inlet. 1) Install the aft section of the modulation panel in the

 opening of the ram air inlet. 2) Make sure the rollers are in the correct tracks. 3) Move the modulation panel aft.

 (b)  
Do these steps to install the forward section of the modulation panel in the ram air inlet: 1) Put the forward section of the modulation panel in the

 correct position. 2) Install the eight bolts, washers, and nuts.

 (c)  
Remove the rig pin.

 (d)  
Turn the modulation quadrant to close the modulation panel.

 NOTE: You can use the shop aid to turn the modulation
____
 quadrant.

 (e)  Attach the forward end of the panel assembly to the structure with the seven bolts.
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737-300/400/500MAINTENANCE MANUAL
 (f)  Do the steps that follow to do a test of the modulation panel. 1) Manually operate the quadrant to open and close the
 modulation panel. 2) Make sure the modulation panel moves freely.
 NOTE: There will be some friction between the bulb
____ seal and the structure.
 F. Put the Airplane Back to Its Usual Condition
 S 414-014
 (1)  
Install the access panel 1305 or 1302.

 S 414-016

 (2)  
Connect the ram air actuator to the torque shaft quadrant
 (Ref 21-52-11/401).

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SEE  A 
DEFLECTOR  PANEL SECTION FORWARD  SECTION AFT PANEL  BULB SEAL 
ROLLER  ARM  TRACK 
PANEL QUADRANT INLET MODULATION  PANEL FAIRING 
0.270 0.2650.265 0.35 0.250.30  RIGGING PIN  A  FWD  INBD 
BACB30NF7-17 MAKE FROM SHOP AID:  FULL RADIUS 
Ram Air Inlet Modulation Panel Installation Figure 401

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737-300/400/500MAINTENANCE MANUAL
 RAM AIR INLET MODULATION PANEL SHAFT ASSEMBLY - REMOVAL/INSTALLATION
____________________________________________________________________
 1.  General_______
 A.  This procedure removes and installs the shaft assembly for the modulation panel.
 TASK 21-52-51-004-006
 2.  Remove the Ram Air Inlet Modulation Panel Shaft Assembly________________________________________________________
 A.  General
 (1)  Before you remove the shaft assembly, you must first remove the modulation panel from the ram air inlet.
　
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