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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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) 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：757 AMM 飞机维护手册 液压 CHAPTER 29 - HYDRAULIC POWER 2(80)
