(2)
Refer to figure 505 for method of measuring large and small rudder travel. Left and right rudder travel measurements when testing rudder are made with respect to left aft corner of indicator on index tab and lower inboard corner of rudder trailing edge.
(3)
The rudder and rudder trim control system must be completely installed and rigged prior to test.
WARNING: RUDDER, ELEVATOR, AND AILERONS ARE FULLY POWERED SYSTEMS. ALL THREE SYSTEMS ARE POWERED SIMULTANEOUSLY. CHECK TO ENSURE THAT PERSONNEL AND OBSTRUCTIONS ARE CLEAR OF ALL CONTROL SURFACES BEFORE TURNING POWER ON. ALSO THE RUDDER, RUDDER PEDALS, AND RUDDER TRIM KNOB SHOULD BE IN NEUTRAL AND ALL RIGGING PINS AND OTHER OBSTRUCTIONS REMOVED FROM THE SYSTEM BEFORE TURNING POWER ON.
PRECAUTIONS SHOULD BE TAKEN TO PREVENT INADVERTENT APPLICATION OF HYDRAULIC POWER DURING THE POWER OFF PORTIONS OF THIS TEST.
CAUTION: WHEN MOVING RUDDER SURFACE BY EXTERNAL FORCE ALWAYS USE LOADING BLOCK TO PREVENT DAMAGE TO RUDDER. APPLY EXTERNAL FORCE APPROXIMATELY 46.9 INCHES FROM RUDDER HINGE LINE BETWEEN RUDDER STATIONS 13.33 and 31.65. DO NOT EXCEED A LOAD OF 50 POUNDS ON RUDDER AT ANY TIME.
(4) Rudder neutral position is defined as the position at which both sides of rudder trailing edge are within width of tab on rudder index plate (Fig. 505) and when rudder pedals are adjusted per step 1.C.(3).
500
May 01/03 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-21-1 Page 521
B. Equipment and Materials
(1)
Rudder Loading Block and Dial Indicator
(a)
Loading block to distribute loads over a minimum of 5 square inches of rudder trailing edge. Suggested loading block: 0.125 inch thick (minimum) by 3 inches by 3 inches approximately. Wood or fiberglass, suitably padded to prevent skin damage.
(b)
Dial indicator with a minimum range of 0.00 to 0.04 inch plus mounting stand for measuring small rudder movements. Measuring point shall be approximately 46 inches from rudder hinge line at lower end of trailing edge.
(2)
Rudder Pedal Force Check Tool - F80212-19 (Preferred) or F80212-1 (Optional)
(3)
Scale - 0 to 2 feed, graduated in inches, tenths and hundredths of an inch
(4)
Rudder Trim Knob Torque Adapter -SE27-2011
C. Test Rudder and Rudder Trim Control System
(1)
Test rudder pedal adjustment and rudder pedal limit travel.
(a)
Provide rudder systems A and B hydraulic power (AMM 27-21-0/201).
(b)
Set rudder trim knob to zero.
(c)
Set rudder pedal to the midposition. 1) Turn the rudder pedal adjustment crank to move the rudder pedals full forward. 2) Turn the rudder pedal adjustment crank to move the rudder pedals full aft. Keep
a record of the number of turns. 3) Turn the rudder pedal adjustment crank half of the number turns forward. Measure at pedal pivot point. Mark this as position 1 on the doghouse.
(d)
Move captain's pedal adjustment to full forward, then move captain's left pedal forward until stop at forward quadrant is contacted and hold in that position. Measure at pedal pivot point. Mark this as position 2 on rudder pedal doghouse.
(e)
Measure total forward travel of left pedal (from position 1 to position 2). Total forward travel shall be 6.86 inches minimum.
(f)
Repeat steps (c) thru (e) with captain's right pedal.
(g)
Move captain's pedal adjustment to full aft, then move captain's left pedal forward until stop at forward quadrant is contacted and hold in that position. Measure at right pedal pivot point. Mark this as position 3 on rudder pedal doghouse.
(h)
Measure total aft travel of right pedal (from position 1 to position 3). Total aft travel shall be 6.89 inches minimum.
(i)
Repeat steps (g) and (h) moving captain's right pedal forward and measuring total aft travel of captain's left pedal.
(j)
Repeat steps (b) thru (i) with first officer's pedals.
(2)
Test rudder hinge and power control unit bearing play.
(a)
Place rudder, rudder pedals and rudder trim knob in neutral position.
NOTE: Neutral rudder position is defined as position where both sides of rudder trailing edge are within width of tab on rudder index plate (Fig. 505).
(b)
Provide rudder systems A and B hydraulic power (AMM 27-21-0/201).
(c)
Fix rudder pedals in neutral position, and check that they do not move during the following steps.
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