757
MAINTENANCE MANUAL

TO BE MEASURED AT OUTERMOST PORTION OF BLADE BASE
APPLIES TO BOTH BLADES
Ram Air Turbine (RAT) Blade End Play Limits
Figure 602

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757 MAINTENANCE MANUAL
 RAM AIR TURBINE (RAT) ACTUATOR CONTROL VALVE - REMOVAL/INSTALLATION
___________________________________________________________________
 1.  General
_______
 A.  This procedure contains two tasks one to remove and one to install the control valve on the ram air turbine (RAT) actuator.
 TASK 29-21-04-024-001
 2.  Remove the Control Valve for the Ram Air Turbine (RAT)
______________________________________________________
 A.  References
 (1)  
AMM 24-22-00/201, Electrical Power

 (2)  
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems

 (3)  
AMM 29-21-00/201, Ram Air Turbine (RAT) System

 B.  Access
 (1)  
Location Zones 198 Wing to Body - Aft Lower Half (Right) 211/212 Control Cabin

 (2)  
Access Panel
 198MR RAT Compartment

 C.  Prepare for the Removal
 S 864-002
 (1)  
Extend the RAT (AMM 29-21-00/201).

 S 864-003

 (2)  
If the valve motor does not operate,
 do these steps to extend the RAT:

 (a)  
Open these circuit breakers on the main power distribution panel, P6: 1) 6F1, RAT MAN or RAT MAN PWR 2) 6F2, RAT MAN CONT

 (b)  
Disconnect the electrical connector from the RAT manual Q switch (S10335) on the E1 rack in the main equipment center.

 (c)  
Supply electrical power (AMM 24-22-00/201).

 WARNING: MAKE SURE ALL PERSONS AND EQUIPMENT ARE CLEAR OF THE RAT
_______ AND THE RAT COMPARTMENT DOOR. FAST MOVEMENT OF THE RAT AND THE DOOR CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 CAUTION: DO NOT HOLD THE SWITCH IN THE DEPLOY POSITION MORE THAN
_______ FIVE SECONDS. THE RAT ACTUATOR SOLENOID CAN BE DAMAGED IF IT IS ENERGIZED MORE THAN TEN SECONDS.
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757 MAINTENANCE MANUAL
 (d)  Push the RAT deployment switch on the engine-start/RAT-control panel to the DEPLOY position and release.
 NOTE: Release the RAT deployment switch in less than 5
____
 seconds.

 (e)  
Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags: 1) 11D26, HYDRAULIC RAT CONT or HYDRAULIC RAT AUTO CONT 2) 11D27, HYDRAULIC RAT AUTO or HYDRAULIC RAT AUTO PWR

 (f)  
Open these circuit breakers on the P6 panel and attach DO-NOT-CLOSE tags: 1) 6F1, RAT MAN or RAT MAN PWR

 (g)  
　
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