(2)
Cut tape joining clamp.
(3)
Separate valve from foot warmer.
3. Install Windshield Air and Foot Outlet Valve (Fig. 401)
A. Gain access to instrument panel area.
B. Connect control cables to windshield air and floor outlet valve.
C. Install clamps over air ducts loosely.
D. Fit valve between upper and lower air duct.
E. Connect valve bracket to bulkhead beam at sta 178.
F. Install clamp on foot warmer outlet loosely.
G. Connect foot warmer outlet to valve.
H. Connect foot warmer outlet to rudder support modules.
I. Tape foot warmer outlet/valve joint per BAC5412, Method 5.
J. Install clamp on foot warmer outlet/valve joint and tighten.
533
Feb 20/89 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 21-22-31 Page 401
Windshield Air and Foot Outlet Valve 533
21-22-31 Page 402 Figure 401 (Sheet 1) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 20/89
533 Windshield Air and Foot Outlet Valve
Feb 20/89 Figure 401 (Sheet 2) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 21-22-31 Page 403
PASSENGER CABIN CONDITIONED AIR DISTRIBUTION SYSTEM -DESCRIPTION AND OPERATION
1. General
A. The passenger cabin conditioned air distribution system consists of the main distribution manifold, distribution manifold duct assembly, riser ducts, and an overhead distribution duct (Fig. 1).
B. Conditioned air for the passenger cabin originates in the main distribution manifold. From the mixing chambers, conditioned air is ducted forward through the distribution manifold duct assembly on the right side of the airplane to a series of riser ducts in the forward cabin wall. Riser ducts located in the right-hand wall supply conditioned air to the overhead distribution duct and, on passenger/cargo convertible airplanes, to the forward light fixture air outlet. A condensate drain tube on the forward end of the distribution duct manifold assembly minimizes the possibility of moisture entering the overhead duct (Fig. 1).
C. The overhead distribution duct is mounted along the centerline of the airplane, extending forward and aft the full length of the passenger cabin. Air is directed into the passenger cabin through a continuous, slot-type nozzle which extends for approximately 70% of the length of the overhead duct. At the forward and aft ends of the cabin, where the ceiling height is less, air enters the cabin through a grille on either side of a light fixture. Temperature of the conditioned air is automatically controlled (Ref 21-61-0).
D. The major portion of the passenger cabin exhaust air flows around the walls of the aft cargo compartment and is discharged overboard through the pressurization control system outflow valves. A small amount of air is exhausted directly overboard from the galley and lavatory vents (Ref 21-30-0).
2. Overhead Supply Riser Ducts
A. Attached to the distribution manifold duct assembly in the forward cargo compartment, riser ducts go up the right wall to supply conditioned air to the overhead distribution duct. Flexible ducts connect to the distribution manifold duct assembly and the overhead distribution duct. The flexible ducts are attached to the overhead supply riser ducts with tape (Detail B, Fig. 1).
527
May 01/75 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 21-23-0 Page 1
Passenger Cabin Conditioned Air Distribution Component Location 530
21-23-0 Figure 1 (Sheet 1) May 01/75
Page 2
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
527 Passenger Cabin Conditioned Air Distribution
Feb 15/72 Components Location 21-23-0
Figure 1 (Sheet 2) Page 3
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Passenger Cabin Airflow 540
21-23-0 Figure 2 May 01/75
Page 4
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
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