(e)
322BZ to get access to the rudder thermal compensating linkage.
S 015-070
(6)
Open these access doors (AMM 06-41-00/201):
(a)
113AL to get access to rig pin holes R1A, R1B, and E/ST6.
(b)
119BL to get access to the left and right rudder ratio changer modules (RRCMs).
S 495-071
(7)
Install these rig pins to prevent elevator movement (Fig. 502):
(a)
E/ST6 (for the control column)
(b)
E/ST7 (for the elevator feel unit)
S 495-072
(8)
Move the towing lever on the metering valve module to the tow position and install the towing lever lockpin in the nose gear (Fig. 503).
F.
Rudder Control Cables RA and RB - Adjustment (Fig. 504)
NOTE: See AMM 20-10-03/401 for Control Cables Removal/Installation
____
instructions.
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757
MAINTENANCE MANUAL
S 825-074
CAUTION:_______ KEEP SOME TENSION IN THE CONTROL CABLES AT ALL TIMES. THIS
WILL KEEP THE CONTROL CABLES ON THEIR PULLEYS AND PREVENT
INCORRECT CABLE OPERATION. IF THE TENSION IS REMOVED, A FULL
INSPECTION OF THE CONTROL CABLE SYSTEM MUST BE DONE.
(1) Adjust the turnbuckles to decrease the tension in cables RA and RB.
NOTE: Use access door 311AL to get access to the turnbuckles.
____
S 825-075
(2)
Turn the rudder trim switch on the aft electronic control panel, P8, until rig pin R3 (for the feel, centering, and trim mechanism) can be easily installed and removed.
S 495-076
(3)
Install rig pin R2 (for the left forward quadrant).
S 825-077
(4)
Do these steps if new cables were installed:
(a)
Adjust the tension in cables RA and RB at the same time to 300 |18 pounds (1334 +/- 80 Newtons) and do this check: 1) Make sure that rig pin R3 (for the feel, centering, and
trim mechanism) can be easily installed and removed.
(b)
Adjust the pressure seals at the aft pressure bulkhead if the cables are bent.
(c)
Remove rig pins R2 and R3.
(d)
Move the rudder pedals through their full travel range 25 times and do these checks: 1) Make sure the aft quadrant moves counterclockwise when the
left rudder pedal is pushed. 2) Make sure the cables are not bent by the fairleads, rubstrips, or grommets that are in the cable system. 3) Make sure the cables do not touch the flanges of the pulleys or quadrants. 4) Make sure the pulleys turn freely and do not touch their guards.
(e)
Install rig pins R2 and R3.
S 825-078
(5)
Adjust the tension in cables RA and RB to the value shown (Fig. 504) and do this check:
(a)
Make sure that rig pins R2 and R3 can move freely in their holes.
S 095-079
(6) Remove rig pins R2 and R3.
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757 MAINTENANCE MANUAL
S 225-425
CAUTION: AVOID RUDDER SURFACE TRAVEL TO THE EXTREME FAR LEFT POSITION
_______ PRIOR TO OR DURING RUDDER ADJUSTMENT. FULL LEFT TRAVEL OF THE RUDDER BEFORE RIGGING COMPLETION RESULTS IN FULL RETRACTION OF THE PCA'S. THIS MAY CAUSE SURFACE CONTACT BETWEEN THE RUDDER LEADING EDGE AND A PCA.
(7)
Move the rudder pedals through their full travel range and do these checks:
(a)
Make sure the cable tension is correct (Fig. 504).
(b)
Make sure the turnbuckles are at least 1.0 inch (25.4 mm) away from the fairleads, grommets, and pulleys at all times.
S 435-081
(8)
Install cliplocks on the turnbuckles.
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