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3) Disconnect hose (1) on cabin air mixer (3) side, retain clamp (2) and blank off.
4) Remove the cabin air mixer by unscrewing the 12 attachment bolts (4) from the firewall and the 5 attachment bolts (16) from the cabin air mixer and the distribution box on the central pedestal console. Retain washers (5) and (17) and discard nuts (6) and (18).
5) Retain shim (8), plate (7), airflow shutter (19) and deflector (9).
6) Disconnect cable (11) (if necessary) from distribution box (10).
7) Clean the excess sealant (TB 09-904) from the firewall. The sealant is used to seal the cabin air mixer.
C. Installation of the cabin air mixer
1) Inspect the hoses for condition. Replace when necessary.
NOTE : If new hose(s) is (are) installed, no traces of release grease (silicone) must remain
inside the hose(s). Any traces must be removed with a clean lintfree cloth.
2) Coat the contact surface of cabin air mixer (3) on the firewall with sealant (TB 09-904).
3) Position cabin air mixer (3).
4) Secure the cabin air mixer to the firewall using the 12 bolts (4), washers (5) and new nuts (6).
5) Position plate (7), airflow shutter (19), shim (8), deflector (9) and distributon box (10).
6) Coat cable (11) of distribution box (10) with oil (TB 03-900) and connect it to airflow shutter (19).
7) Secure distribution box (10) to the central pedestal console with the 5 bolts (16), washers (17) and new nuts (18).
8) Connect hose (1) to cabin air mixer (3) and secure with clamp (2).
9) Connect hoses (13) and (14) to distribution box (10) and secure with clamps (12) and (15).
10) Ensure that air conditioning controls move freely.
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Validity : S / N 585 - 9999 21
_ 40-02 (BM) Page 201
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11) Make sure all the tools and materials are removed and the work area is clean and free from debris.
12) Install the engine cowlings - refer to 71-10-01.
13) Check for leaks during run-up.
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Validity : S / N 585 - 9999 21-40-02 ,B,„) Page 202
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Cabin air mixer - Removal / Installation
Figure 201
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Validity : S / N 585 - 9999 21-40-02 (BM) Page 203
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COOLING
DESCRIPTION AND OPERATION
1. GENERAL
The cooling system decreases the temperature inside the cabin to improve passengers comfort in hot atmosphere.
The system consists of :
- the vapor cycle cooling system (Option) - refer to 21-55-00.
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Validity : S / N 823 - 849, 888, 948 - 9999 21 50-00Page 1
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VAPOR CYCLE COOLING SYSTEM
DESCRIPTION AND OPERATION
1. GENERAL
The aircraft can be equipped with an optional vapor cycle cooling system, using refrigerant (TB 05-922). The system consists of :
　
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