S 865-074
 (18) Extend the wing flaps with electrical or hydraulic power.
 (a)  Make sure these results occur when the flaps move from the fully retracted position: 1) AIRPLANES WITH RAM AIR EXHAUST LOUVERS (PRE-SB 21-1123);
 The inlet modulation panels and the exhaust louvers open.
 2)  AIRPLANES WITHOUT RAM AIR EXHAUST LOUVERS (POST-SB 21-1123); The inlet modulation panels open.
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737-300/400/500MAINTENANCE MANUAL
 3) The RAM DOOR FULL OPEN lights come on. 4) The turbofans start. 5) The deflector doors stay closed.
 S 865-075
 (19) Remove the DO-NOT-CLOSE tag and close this circuit breaker:
 (a)  AIR/GND RELAY & LTS
 S 715-076
 (20)
 Make sure that the deflector doors for the ram air inlets open fully.

 S 865-183

 (21)
 Connect the electrical connectors D486 (left side) and D490 (right side) to the pack valve limit switch.

 G. Put the Airplane to Its Usual Condition
 S 865-080
 (1)  
Remove pneumatic pressure if it is not necessary (AMM 36-05-00/201).

 S 415-081

 (2)  
Close the bay doors to the air conditioning equipment.

 S 865-082

 (3)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 TASK 21-52-00-705-089
 3. Ram Air System Drag Test
________________________
 A. Equipment
 (1)  Spring Scale, 0-100 lbs
 B. Access
 (1)  Location Zones
 211 Left Ram Air Duct
 213 Right Ram Air Duct

 C. Procedure
 S 015-083
 (1)  
Disconnect the ram air actuator from the quadrant arm.

 S 485-084

 (2)  
Attach the spring scale through the actuator attach bushing of the quadrant.

 (3)  
Start the test with the ram air system in the fully open position.

 S 865-085
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 (4)  S 725-086Keep the scale at a right angle to the quadrant arm and slowly pull the quadrant through its travel.
 (5)  S 725-087Make sure the force on the scale is not more than 75 pounds.
 (6)  S 415-088Connect the actuator to the quadrant arm.

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 RAM AIR ACTUATOR - REMOVAL/INSTALLATION
_______________________________________
 1.  General
_______
 A.  Before you attach the ram air actuator to the torque shaft quadrant, you must make sure that:
 (1)  
The actuator is fully retracted.

 (2)  
The ram air system is fully open.

 B.  If the actuator that you remove has a bad motor, you must do these steps:
 NOTE: You must do these steps only if you install an actuator with
____ the part number 541674-3 or -5. Actuators with these part numbers do not have motors that can operate with continuous power. A ram air controller that is defective and supplies constant power could cause the failure of an actuator.
 (1)  
Remove the ram air controller.

 (2)  
Do a check of the ram air controller with the manufacturer's test.
　
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