(3)
24-22-00/201, Manual Control
(4)
36-05-00/201, Pneumatic Systems
B. Access
(1)
Location Zones 212 Left Air-Conditioning Equipment Bay 214 Right Air-Conditioning Equipment Bay
(2)
Access Panels (AMM 12-31-31/201) 3303 - Left Air-Conditioning Access Panel 3403 - Right Air-Conditioning Access Panel
C. Procedure
S 424-007
(1) Install the check valve:
(a)
Remove the duct covers.
(b)
Install the check valve.
NOTE: The flow arrow must point forward.
____
(c)
Move the clamps onto the check valve.
(d)
Tighten the clamps.
D. Do a Leakage Check of the Check Valve
S 864-008
(1)
Supply pneumatic power to the airplane (AMM 36-05-00/201).
(2)
Set the applicable PACK switch to the AUTO position.
S 794-013
(3)
Examine the check valve for leakage:
S 864-009
(a) A small leak is satisfactory.
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737-300/400/500MAINTENANCE MANUAL
(b) A large leak must be repaired.
E. Put the Airplane Back to Its Usual Condition
S 414-010
(1)
Close the applicable access panel.
S 864-014
(2)
Set the applicable PACK switch to the OFF position.
S 864-011
(3)
Remove the pneumatic power from the airplane if it is no longer necessary (AMM 36-05-00/201).
S 864-012
(4)
Remove the electrical power from the airplane if it is no longer necessary (AMM 24-22-00/201).
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737-300/400/500MAINTENANCE MANUAL
AIR CONDITIONING ACCESSORY UNIT - REMOVAL/INSTALLATION
______________________________________________________
1. General_______
A. The air conditioning accessory unit is installed in the E/E equipment compartment on the E3-2 shelf.
TASK 21-51-06-004-009
2. Air Conditioning Accessory Unit Removal (Fig. 401)_______________________________________
A. References
(1) 20-10-07/201, E/E Rack-Mounted Components
B. Access
(1)
Location Zone
205 Electrical Compartment
(2)
Access Panel
1201L Electronic Equipment Access Door
C. Procedure
S 864-017
(1) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) On the main power distribution panel, P6: 1) 6A3, TEMP CONTROL AUTOMATIC R 2) 6A4, TEMP CONTROL AUTOMATIC L 3) 6C1, AIR CONDITIONING VALVES TURBOFAN R 4) 6C2, AIR CONDITIONING VALVES TURBOFAN L 5) 6C3, AIR CONDITIONING VALVES PACK R 6) 6C4, AIR CONDITIONING VALVES PACK L 7) 6D4, AIR COND OVERHEAT 8) 6E1, AIR CONDITIONING RAM MOD R 9) 6E2, AIR CONDITIONING RAM MOD L 10) 6E3, AIR COND RAM MOD CONTROL R 11) 6E4, AIR COND RAM MOD CONTROL L
S 014-001
(2) Get access to the air conditioning accessory unit:
(a)
Open the access door, 1201L, for the electronic compartment.
(b)
Go to the E3-2 shelf.
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A 737-300/400/500MAINTENANCE MANUAL
AIR CONDITIONING ACCESSORY UNIT
Air Conditioning Accessory Unit Location
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