(2)  
Open the E/E compartment door for access (AMM 52-48-41).

(3)  
Place the maintenance stand in position at the E/E compartment.

(4)  
Remove the airstair drip pan and moisture shroud as follows:

(a)  
Ensure the airstair drain does not contain liquid.

(b)  
Loosen the clamp which attaches the drain tube to the airstair drip pan access panel and disconnect the drain tube.

(c)  
Remove the airstair drip pan access panel.

(d)  
Remove the five screws, seal washers, and nuts which attach the drip pan to the support brackets.

(e)  
Carefully disconnect the forward moisture shroud from the seven stud fasteners at the forward edge of the drip pan.

(f)  
Retract the forward airstair until the forward airstair door starts to close.

(g)  
Remove the airstair drip pan from the electronic compartment through the opening for the forward airstair door.

(h)  
At the nose wheel well bulkhead, remove the 10 screws, washers, and nuts which attach the forward moisture shroud to the support bracket.

(i)  
At the left side of the nose wheel well, carefully disconnect the shroud from the five stud fasteners.

(j)  
At the right side of the nose wheel well, carefully disconnect the shroud from the two stud fasteners.

(k)  
Remove the forward moisture shroud from the electronic compartment.

500 
May 01/99  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  25-51-01 Page 401 

3.  Electronic Compartment Drip Pan and Moisture Shroud Installation
A.  References
(1)  
AMM 20-30-51, Miscellaneous Materials

(2)  
AMM 25-51-00, Electronic Compartment

(3)  
AMM 51-31-0, Seals and Sealing

(4)  
AMM 52-48-41, E/E Compartment Door

(5)  
AMM 52-61-0, Forward Airstair

B.  Equipment
(1)  Maintenance Stand
C.  Access
(1) 
 Location Zones
205 E/E Compartment

(2) 
 Access Panels
1201 E/E Compartment Door

D.  Procedure (Fig. 401)
(1)  Install the airstair drip pan and moisture shroud as follows:
(a)  
At the nose wheel well bulkhead, attach the forward moisture shroud to the support bracket with 10 screws, washers, and nuts.

(b)  
At the left side of the nose wheel well, carefully connect the moisture shroud to the five stud fasteners.

(c)  
At the right side of the nose wheel well, carefully connect the moisture shroud to the two stud fasteners.

(d)  
If necessary, retract the forward airstair until the forward airstair door starts to close to give better access.

(e)  
Ensure the access panel is removed from the airstair drip pan before you put it into the airplane.

CAUTION:  EXTREME CARE MUST BE TAKEN WHEN YOU SLIDE THE AIRSTAIR DRIP PAN INTO THE ELECTRONIC COMPARTMENT OR DAMAGE CAN RESULT TO EQUIPMENT.

(f)  
Slide the airstair drip pan into the electronic compartment through the opening for the forward airstair door.

(g)  
Extend the airstair for access (AMM 52-61-0).

(h)  
Carefully connect the forward moisture shroud to the seven stud fasteners at the forward edge of the drip pan.

(I)  
Install the drip pan to the support brackets with five screws, seals washers, and nuts.

(j)  
Install the airstair drip pan access panel and torque the fasteners until the gasket seal is approximately 30% to 50% compressed.

NOTE:  It is recommended to replace the gasket with a new silicone sponge rubber gasket seal to make sure the drip pan does not leak when it contains liquid. Replace by cleaning the gasket contact surface on the access panel, then bonding gasket to the panel using adhesive. After applying adhesive to panel, gasket should be installed immediately onto panel, prior to the point when the adhesive starts to film over. Adhesive must setup for a minimum of two hours before access panel can be reinstalled.
500 
25-51-01 Page 402  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  May 01/99 

H69197
500  Electronic Equipment Compartment Moisture Shroud and Drip Pan Installation 
May 01/99  Figure 401  25-51-01 
Page 403 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

(k)
Connect the drain tube to the airstair drip pan access panel and tighten the drain tube clamp.

(l)  
　
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