S 435-008
(7)
Tighten the clamp screw 8 to 12 pound-inches.
S 485-024
(8)
Remove the lockwire and turn the thumbnut on the microadjustment rod until you get the smallest possible value less than 30mV.
S 435-009
(9)
Install the lockwire on the thumbnut.
S 085-010
(10)
Disconnect the VTVM, the test set, and the test cables.
S 435-011
(11)
Connect the airplane wires to the A/P actuators and the aileron position sensors.
S 825-012
(12)
Do the test again for the B system test jacks and make sure the B system sensors are nulled.
TASK 22-11-29-745-032
3. Aileron Position Sensor Adjustment (DFCS BITE)__________________________________
A. General
(1) The adjustment of the aileron position sensor is given as part of DFCS BITE, which uses the FMCS CDU.
B. References
(1)
12-31-41/201, Access Doors and Panels
(2)
24-22-00/201, Electrical Power Control
(3)
27-11-00/201, Aileron and Aileron Trim Control System
(4)
27-41-00/501, Horizontal Stabilizer Trim Control System
C. Access
(1) Location Zone
102 Control Cabin
216 Left Main Wheel Well
217 Right Main Wheel Well
D. Prepare for DFCS BITE
S 865-033
(1) Supply electrical power (Ref 24-22-00/201).
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A 737-300/400/500MAINTENANCE MANUAL
(2) S 865-034Make sure that the BAT switch (pilots forward overhead panel) is in the ON position.
(3) S 865-035Make sure that the STANDBY POWER switch is in the AUTO position.
(4) S 865-036Put the MASTER DIM and TEST switch, on the P2 center instrument panel, to the TEST position.
(5) S 865-039Make sure all indicator lamps and annunciator lights on the pilots panel operate correctly.
(6) S 865-040Make sure that the circuit breakers (on the P6 and P18 circuit breaker panels) for the systems shown below are closed and that the systems will operate. (a) FMCS (b) DADC (No. 1 and 2) (c) Interphone system (d) LANDING GEAR AIR/GND RELAY & LIGHTS (e) AFCS (A and B)
NOTE:____ Make sure that you close the AFCS A FCC DC and AFCS B FCC DC circuit breakers last.
(f) (g) Mach TrimYaw Damper
(7) S 865-043Make sure all instrument switches are in the normal position.
(8) S 865-020Make sure the airplane is in the ground mode.
NOTE:____ You can find the ground and air mode lights on the E11 shelf, forward of the nose wheel well.
S 865-044
WARNING:_______ MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(9) Supply hydraulic pressure (Ref 27-11-00/201).
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A
737-300/400/500MAINTENANCE MANUAL
S 865-013
(10) Make sure the indicated airspeed (IAS) is less than 50 knots.
E. DFCS BITE Test
S 865-048
(1) Do the steps below to do the BITE test.
(a)
Push the INIT/REF key on the FMCS CDU and make sure that the CDU shows POS INIT page or PERF INIT page.
(b)
Push the line select key (LSK) adjacent to (<INDEX) and make sure the CDU shows INIT REF INDEX 1/1.
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