(d)
If necessary, retract the forward airstair until the forward airstair door starts to close to give access.
(e)
Make sure 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 52-61-00/001).
(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, seal 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
____ gasket seal, to make sure the drip pan does not leak when it contains liquid.
(k)
Connect the drain tube to the airstair drip-pan access-panel and tighten the drain tube clamp.
(l)
Do a visual inspection to make sure the drip pan is clean and there is no blockage of the drain tube.
S 944-022
(2)
Remove all tools and equipment from the work area.
S 414-023
(3)
Close the electronic-equipment compartment door. (AMM 52-48-41/001).
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A 737-300/400/500MAINTENANCE MANUAL
AIRSTAIR DOOR OPENING
DRIP PAN
SEE A
DRAIN HOSE
SEE B
ACCESS DOOR
AIRSTAIR DRIP PAN ACCESS PANEL
DRAIN PAN FASTENERS (5 LOCATIONS)
STUD (7 LOCATIONS) DRIP PAN
STUD
(2 LOCATIONS)
SCREW (10 LOCATIONS) WASHER BOLT
STUD (5 LOCATIONS) ACCESS PANEL INFWD
THE DRAIN PAN DRAIN HOSE
DRIP PAN DRAIN HOSE
A
B
Electronic Equipment Compartment Moisture Shroud and Drip Pan Installation
Figure 401
H36939
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A
737-300/400/500MAINTENANCE MANUAL
ELECTRONIC-COMPARTMENT MOISTURE SHROUD AND DRIP PAN - INSPECTION/CHECK
______________________________________________________________________
1. General
A. This procedure supplies the task(s) that follow:
(1)
For airplanes with an airstair installation:
(a) Inspection of the moisture shroud and the forward airstair drip pan which protect the E1 rack in the electronic compartment.
(2)
It is recommended for you to do the inspection of the moisture shroud and/or drip pan in the electronic- compartment when one of these unwanted liquid spills occurs, as follows:
(a)
Over-servicing of the forward toilet system.
(b)
Liquid spill in the forward lavatory area.
(c)
Liquid spill in the forward galley area.
(d)
Excessive quantity of snow/ice/rain on the forward airstair when retracted to the flight position.
(3)
The moisture shroud must be free from holes and correctly installed.
NOTE: The surface of the shroud must have a good surface tension
____ and have no areas where liquid could possibly collect.
(4) All drain tubes must be free from blockages and the drain pan is to be clean and empty.
NOTE: For airplanes with airstair installation.
____ During extreme cold weather, ice, snow and dirt can be brought aboard on the airstair and cause a blockage to the drain tube.
(5) The forward toilet system must be correctly installed and there are no leaks in toilet drain tube and the ground flush tube.
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