B. Procedure
S 014-003
(1)
Open the access doors to the air conditioning bay and the ram air duct.
S 024-005
(2)
Remove the louver assembly:
(a)
Cut the lockwire and remove the two spring pins which hold the universal joint of the torque shaft to the arm (Fig. 401, Detail B).
(b)
Loosen the clamp and disconnect the flexible duct from the duct.
(c)
Remove the cover.
(d)
Remove the screws (20 locations) that attach the louver assembly to the airplane.
(e)
Remove the bolts which hold the torque shaft sections together.
NOTE: To make sure the bolt holes are aligned correctly, make
____ a mark on the torque shaft.
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21-52-91
(PRE-SB 21-1123) ú ú 01 Page 401 ú Mar 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
(f) Push the torque shaft sections together to disconnect the universal joint from the arm.
NOTE: Hold the torque shaft sections together with a piece of
____
tape.
(g)
Hold the louver assembly while you remove the bolts (12 locations) that attach the duct collar to the web.
(h)
Remove the louver assembly.
TASK 21-52-91-404-002
3. Ram Air Exhaust Modulation Louver Assembly Installation (Fig. 401)
_______________________________________________________
A. Special Tools and Equipment
(1) F70207-93 Rigging Pin Kit
B. Standard Tools and Equipment
(1) Drill Bit - 0.190 (+0.002/-0.005) inch diameter
C. References
(1) 21-52-00/501, Ram Air System
D. Access
(1) Location Zones
212/214 Air Conditioning Equipment Bay
211/213 Ram Air Duct
E. Procedure
S 424-006
(1) Install the louver assembly:
(a)
Hold the louver assembly in its position while you install the bolts (12 locations) loosely through the duct collar and the web.
(b)
Install the screws (20 locations) that attach the louver assembly to airplane.
(c)
Install the cover.
(d)
Tighten the bolts that attach the duct collar to the web.
(e)
Connect the flexible duct to the duct and install the clamp.
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(PRE-SB 21-1123) ú ú 02 Page 402 ú Mar 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
ACCESS DOOR TO RAM AIR DUCT
SEE A
LOUVER ASSEMBLY
SEE B
ACCESS DOOR TO AIR CONDITIONING EQUIPMENT BAY RAM AIR ACTUATOR (LEFT AND RIGHT) FWD SEE C
DUCT WHEEL A
CLAMP WELL WEB
FLEXIBLE BOLT
DUCT (12 LOCATIONS)
ARM
COVER
BOLT
RAM AIR
(11 LOCATIONS) ACTUATOR
PIN HOLE FOR RIGGING PIN
TORQUE SHAFT (1/4-INCH DIAMETER) QUADRANT
SEE D
SEE E BOLT (2 LOCATIONS)
RIGGING PIN
TORQUE SHAFT SCREW (5/16-INCH
SPRING PIN
(20 LOCATIONS) DIAMETER)
(2 LOCATIONS) LOUVER ASSEMBLY TORQUE SHAFT
LOUVER ASSEMBLY
B
INBD
FWD
RAM AIR ACTUATOR
C
Ram Air Exhaust Modulation Louver Assembly Installation Figure 401 (Sheet 1)
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