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Air from both front closing panels can flow up through the fuselage side ducts. Adjustable outlets in the cockpit allow the pilots or passengers to control cool air flow into the cockpit. Four adjustable outlets in the roll bar give cool air to the passengers.
Both hot and cold air leave the cockpit through holes 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.
% (2) Additional Ventilation System (optional, O.M 40-099)
% Air enters the system at two NACA air inlets in the front fuselage on the left and right side. % Hoses connect the air inlets to two adjustable outlets in the bottom instrument panel.
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AMM

Sealed

% Figure 2: Cabin Ventilation System Schematic, Lycoming Version
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Air Conditioning
AMM

Trouble-Shooting
1. General
This table tells you how to trouble-shoot the air conditioning system. If you find the trouble in column 1, do the repair in column 3.
Trouble  Possible Cause  Repair 
Carbon Monoxide detector becomes dark.  Exhaust muffler cracked.  Replace or repair the exhaust muffler. (Refer to Chapter 78). 
Burning smell in the cockpit.  Exhaust muffler cracked.  Replace or repair the exhaust muffler. (Refer to Chapter 78). 
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.  Adjust the distributor valve control cable. Replace the distributor valve control cable. 
No hot air flows to the footwells.  Distributor valve control cable out of adjustment. Distributor valve control cable broken.  Adjust the distributor valve control cable. Replace the distributor valve control cable. 
No cool air from 1 outlet. Other outlets operate correctly.  Outlet defective.  Replace the cool air outlet. 

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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 78-00 for maintenance data on the exhaust muffler part of the heat-exchanger.
2. Remove/Install the Heat Valve
Refer to Figure 3.
A. Remove the Heat Valve
Detail Steps/Work Items  Key Items/References 
(1)  Remove the engine cowlings.  Refer to Section 71-10. 
WARNING: IF THE ENGINE HAS BEEN RUNNING, TAKE CARE WHEN YOU TOUCH THE HEAT VALVE. THE HEAT VALVE GETS HOT. 
(2)  Release the worm drive clamp which holds the flexible hose to the heat valve. Then disconnect the hose from the valve. 
(3)  Set the CABIN HEAT control lever to ON. 
(4)  Loosen the screw which holds the control cable to the swivel fitting in the heat valve.  Access through the front of the valve. 
(5)  Remove 5 bolts and washers which attach the heat valve to the firewall. 
(6)  Remove the heat valve from the firewall. 

Doc # 6.02.01 Page 201
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AIRCRAFT AMM
Instrument Panel Cover
Distributor Valve Control Cable
Defrost Hose
Defrost Hose Heat Valve Control Cable
Firewall
Heat Valve Control
Cable Lock-Nut

Hot Air Hose to Passenger Foot Wells Cable Binder Attaching Bolt Washer Floor Panel
　
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