(2)
Put the warning notice(s) in position to tell persons not to pressurize the Blue hydraulic system:
-in the cockpit on the hydraulic section 40VU of the overhead panel, - on the ground service panel of the Blue hydraulic system.
(3)
Make sure that the Blue hydraulic system is depressurized and put it in the maintenance configuration. (Ref. TASK 29-00-00-864-001).
(4)
Depressurize the reservoir of the Blue hydraulic system (Ref. TASK 29-14-00-614-001).
(5)
Extend the Ram Air Turbine (RAT) (Ref. TASK 29-22-00-869-005).
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B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU HYD/RAT/CTL 2801GE D14 106VU CSM/G /EV/MAN/SPLY 6XE B04 121VU HYDRAULIC/RAT/SPLY/EXTN/SOL1 2803GE P33
4. Procedure
_________
(Ref. Fig. 513/TASK 29-22-00-991-027)
Subtask 29-22-00-820-067
A. Adjustment of the RAT Interlock Proximity Switch
(1)
Remove the nut (10), the washers (9), (5) and the bolt (6) which attaches the eye-end (8) of the ejection jack to the leg assembly (4).
(2)
Remove the the ejection jack from the forked mounting (7).
(3)
Turn the blades of the RAT out of line with the leg assembly (4).
(4)
Install an inclinometer on the top of the RAT hub.
(5)
Move the leg assembly (4) from the horizontal position (0 degrees on the inclinometer) approximately 6 degrees to the stowed position. In this position measure the gap "X" between the interlock proximity switch (3) and the flag lever (1). Make sure that the value is between 0.018 in. (0.4571 mm) and 0.020 in. (0.5079 mm). If necessary adjust the value of the gap "X" with applicable shims (Ref. TASK 29-22-51-400-011).
NOTE : Make sure that the RAT blades do not touch the fuselage.
____
(6)
Release the leg assembly (4) to the horizontal position.
(7)
Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 2801GE
(8)
Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002).
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RAT Interlock Proximity Switch
Figure 513/TASK 29-22-00-991-027
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(9) On the RAT ground control-panel 3GE (11):
-
Set the 28VDC switch to the ON position.
-
Set the LAMP TEST switch to the test position and make sure that all lamps come on.
(10)
Turn the blades of the RAT out of line with the leg assembly (4).
(11)
Move the leg assembly (4) from the horizontal position (0 degrees on the inclinometer) to the stowed position.
NOTE : Make sure that the RAT blades do not touch the fuselage.
____
(12)
Make sure that the INTERLOCK WARNING lamp on the RAT ground control panel 3GE (11) comes on between 6 and 7 degrees from the horizontal position.
(13)
If necessary, adjust the RAT interlock proximity switch (3) as follows:
(a)
If the INTERLOCK WARNING lamp comes on before the leg assembly
(4) is in the 6 degree position:
-Loosen the nuts (2) and move the RAT interlock proximity switch
(3) in the forward direction.
(b)
If the INTERLOCK WARNING lamp comes on after the leg assembly (4) is in the 7 degree position:
-Loosen the nuts (2) and move the RAT interlock proximity switch
(3) in the rearward direction.
(14)
After the adjustment of the RAT interlock proximity switch is correct, TORQUE the nuts (2) to between 0.226 and 0.249 m.daN (19.99 and 22.03 lbf.in).
(15)
Set the stow switch on the RAT ground control panel 3GE (11) to the RESET position and release it to reset the interlock logic in the RAT ground control panel 3GE.
(16)
Turn the blades of the RAT in line with the leg assembly (4).
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