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% (2) Passengers' Cabin Air
% Air enters the system at a NACA air inlet below the leading edge of the left stub-wing. The front % main bulkhead and the inner and outer closing ribs make a collector box. Air can only leave the % area through an opening in the front closing rib.
% The front of the rib connects to a hose across the fuselage. The pipe also connects to the front % closing rib of the right stub-wing.
% The top part of the front closing rib on each side connects to the fuselage side ducts. The side % ducts connect to the roll bar. The side ducts and roll bar have adjustable outlets.
% Air enters the system through the NACA air inlet. It flows through the left front closing rib and % across the fuselage, to the right front closing rib.
% Air from both front closing ribs can flow up through the fuselage side ducts. Four adjustable % outlets in the roll bar give cool air to the passengers.
% (3) Instrument Cooling
% Cool air for instrument cooling goes forward through the left and right fuselage side ducts.
% C. Air Exit
% Both hot and cold air leave the cockpit through slots in the baggage compartment frame. The air % flows through the rear fuselage and leaves the airplane through the gap between the fuselage and % the rudder.
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% % % Figure 2: Cabin Ventilation System Schematic Diagram
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Air Conditioning
AMM

% Trouble-Shooting % 1. General
% The table below lists the defects you could have with the air conditioning system. If you have the % trouble detailed in the Trouble column read across to the Possible Cause column. Then do the repair % given in the Repair column.
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Trouble  Possible Cause  Repair 
No hot air flows to the system at any setting.  Heat valve control cable out of adjustment. Heat valve control cable broken. Defective heat exchanger. Defective engine cooling system.  Adjust the heat valve control cable. Replace the heat valve control cable. Trouble-shoot in accordance with Section 75-01. Trouble-shoot in accordance with Section 75-01. 
Heating system supplies warm air when set to OFF.  Heat valve control cable out of adjustment. Heat valve control cable broken.  Adjust the heat valve control cable. Replace the heat valve control cable. 
No hot air flows to the canopy.  Distributor valve control cable out of adjustment. Distributor valve control cable broken. Canopy defrost hose disconnected.  Adjust the distributor valve control cable. Replace the distributor valve control cable. Re-connect hose. 
No hot air flows to the footwells.  Distributor valve control cable out of adjustment. Distributor valve control cable broken. Air hose to footwell disconnected.  Adjust the distributor valve control cable. Replace the distributor valve control cable. Re-connect hose. 
No cool air from 1 outlet. Other outlets operate correctly.  Outlet defective. Air duct blocked.  Replace the cool air outlet. Remove blockage. 

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Air Conditioning
AMM

% Maintenance Practices % 1. General
% This Section gives you the maintenance practices for the cabin heating system and tells you how to % replace outlets for the cooling system. Refer to Section 75-01 for maintenance data on the heat-% exchanger.
　
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