(d)  
If the blade-lock plunger does not engage the hub during retraction, the blade index switch will de-energize the safety valve. The valve moves to the OFF position, removes hydraulic pressure from the actuator, and prevents actuator movement.
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 29-21-00
 ALL  ú ú 02 Page 10 ú May 28/99 
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. 
A 
757 FAULT ISOLATION/MAINT MANUAL 
RAM AIR TURBINE (RAT) SYSTEM
COMPONENT  FIG. 102 SHT  QTY  ACCESS/AREA  REFERENCE  
ACTUATOR - RAT DEPLOYMENT  2  1  FAIRING198MR, AFT RIGHT WING-TO-BODY  29-21-05  
ASSEMBLY - RAT, M10148  3  1  FAIRING 198MR, AFT RIGHT WING-TO-BODY  29-21-01  
CABLE - RAT BLADE LOCK CARD - (REF 77-12-00, FIG. 101) LEFT ENGINE SPEED, M10298 RIGHT ENGINE SPEED, M10311  4  1  198MR, AFT RIGHT WING-TO-BODY FAIRING, RAT ASSEMBLY, M10148  29-21-19  
CIRCUIT BREAKERS RAT MAN CONT, C4287 1  1  6F2 FLIGHT COMPARTMENT, P6 PANEL  *  
RAT MAN PWR, C4062  1  6F1 *  
CIRCUIT BREAKERS  1  FLIGHT COMPARTMENT, P11 PANEL  
HYDRAULIC RAT AUTO CONT, C4061  1  11D26  *  
COMPUTER - (REF 31-41-00, FIG. 101) EICAS L, M10181 EICAS R, M10182 HYDRAULIC RAT AUTO PWR, C4216  1  11D27  *  
DOOR - RAT COMPARTMENT  2  1  FAIRING198MR, AFT RIGHT WING-TO-BODY  29-21-09  
HARNESS - RAT WIRE  4  1  198MR, AFT RIGHT WING-TO-BODY FAIRING, RAT ASSEMBLY, M10148  29-21-18  
HUB - RAT  4  1  198MR, AFT RIGHT WING-TO-BODY FAIRING, RAT ASSEMBLY, M10148  29-21-01  
LINK - RAT DOOR ACTUATOR 3  1  FAIRING 198MR, AFT RIGHT WING-TO-BODY  29-21-10  
MODULE - RAT CHECKOUT PANEL - (REF 80-11-00, FIG. 101) ENG START/RAT CONT, M10468  5  1  RIGHT WHEEL WELL  29-21-11  
PLUNGER - RAT BLADE LOCK  4  1  198MR, AFT RIGHT WING-TO-BODY FAIRING, RAT ASSEMBLY, M10148  29-21-19  
PUMP - RAT HYDRAULIC  4  1  198MR, AFT RIGHT WING-TO-BODY FAIRING, RAT ASSEMBLY, M10148  29-21-01
 * SEE THE WDM EQUIPMENT LIST 
Ram Air Turbine (RAT) System - Component Index
Figure 101 (Sheet 1)
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 29-21-00
 ALL  ú 
 ú  03  Page 101 
 ú  Jun 20/91 
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. 
A 
757 FAULT ISOLATION/MAINT MANUAL 
COMPONENT  SHT 102 FIG.  QTY  ACCESS/AREA  REFERENCE  
SYSTEM 1 AIR/GROUND, K10384 RAT MANUAL CONTROL, K10058RELAY - (REF 31-01-36, FIG. 101) RAT AUTO CONTROL, K10059 RELAY - (REF 31-01-33, FIG. 101)  
SENSOR - RAT TACHOMETER SPEED  4  1  FAIRING, RAT ASSEMBLY, M10148 198MR, AFT RIGHT WING-TO-BODY  29-21-15  
SOLENOID - RAT ACTUATOR AUTO, M10407  2  1  198MR, AFT RIGHT WING-TO-BODY ACTUATOR FAIRING, RAT DEPLOYMENT  *  
SOLENOID - RAT ACTUATOR MANUAL, M10406  2  1  198MR, AFT RIGHT WING-TO-BODY ACTUATOR FAIRING, RAT DEPLOYMENT  *  
SWITCH - RAT ARM Q AIRSPEED, S10334  6  1  RACK 119BL, MAIN EQUIPMENT CENTER, E1 29-21-53  
 
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