S 985-136
(6)
Make sure the internal lock of the deployment actuator stops the movement of the RAT when you push the RAT forward with your hand.
NOTE: This is a check that the RAT is locked in the extended
____
position.
S 865-092
(7) Open the following circuit breaker on the P6 panel and install the RAT circuit breaker lock set:
(a)
6F1, RAT MAN PWR or RAT MAN
(b)
6F2, RAT MAN CONT
S 865-093
(8) Open these circuit breakers on the P11 panel and install the RAT circuit breaker lock set:
(a)
11D26, HYDRAULIC RAT AUTO CONT or HYDRAULIC RAT CONT
(b)
11D27, HYDRAULIC RAT AUTO PWR or HYDRAULIC RAT AUTO
NOTE: To back-drive the RAT, the preferred method is to use
____ the safety screen around the RAT blades. However, an optional, alternate method may be used in place place of the safety screen. This method uses rope to secure the area below the RAT compartment, by roping off with a 20-foot (6 meter) diameter area. This will keep personnel from entering area close to RAT blades.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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757 MAINTENANCE MANUAL
S 495-224
WARNING: BEFORE THE RAT IS BACK-DRIVEN, INSTALL THE SAFETY SCREEN
_______ (PREFERRED), OR PUT A 20-FOOT (6 METER) DIAMETER SECURED/ROPED-OFF AREA (ALTERNATE) BELOW THE RAT COMPARTMETN DOOR TO PREVENT PERSONNEL ENTRY. THE FAST MOVEMENT OF THE TURBINE BLADES CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(9) If your use the alternate method, put a 20 foot (6 meter) diameter secured/roped-off area below the RAT compartment door to prevent personnel entry. If you use the RAT safety screen method (preferred), do these steps to install the RAT safety screen (Fig. 502):
ú (a) If the lift fixture A71015-87 is used, secure the adapter to the safety screen support with a nut and washer.
(b)
Attach the safety screen support to the lifting fixture.
(c)
Put the safety screen on the support and tighten the strap around the safety screen.
(d)
Remove the bolts and move apart the forward and aft cages of the safety screen.
(e)
Remove the top bolt, spacer, and nut from the brace which is in the aft cage.
(f)
Loosen the knurled retainer nut on the adjustment screw on each side of the brace in the aft cage.
(g)
Turn both adjustment screws to retract the pads on the end of the adjustment screws.
NOTE: This will give clearance to install the aft cage on the
____ RAT hydraulic pump.
(h)
Put the aft cage on the RAT hydraulic pump.
(i)
Install the top bolt, spacer, and nut in the brace to attach the aft cage to the RAT.
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757
MAINTENANCE MANUAL
BOLT SPACERAFT NUT
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