S 485-003
(2)
Install the rig pin through the crank and the housing for the RVDT assembly.
S 865-004
(3)
Supply a 26 VAC 400HZ voltage across pins 1 and 2 on one of the three electrical connectors on the RVDT assembly.
NOTE: You can use a jumper wire from pin No. 1 and 2 at the RVDT to
____ pin No. 1 and 2 on the airplane-side RVDT connector.
S 485-005
(4)
Connect a multimeter across pins 3 and 5 to measure the output voltage of the RVDT.
(5)
Make sure the output voltage of the RVDT is -100mV to +100mV.
S 825-007
(6)
If the output voltage is not in the tolerance, adjust the RVDT assembly:
(a)
Loosen the four screws on the RVDT assembly.
(b)
Use the adjustment screw on the RVDT assembly to adjust the output voltage until it is in the tolerance.
(c)
Tighten the four screws.
S 765-006
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A 747-400 MAINTENANCE MANUAL
SEE A
SEE B
A
FLAP CONTROLLEVER
LEVER RVDT ASSEMBLY FLAP CONTROL
ADJUSTMENT SCREW
FLAP CONTROL LEVER RVDT ASSEMBLY CRANK SCREW (4 LOCATIONS) C
SEE C
RIG PIN HOLE
RIG PIN SLOT
ELECTRICAL CONNECTORS
B
Figure 501 Flap Control Lever RVDT Assembly Adjustment
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A
747-400 MAINTENANCE MANUAL
(d) (e) Install the lockwire on the four screws.Make sure the output voltage stays in the tolerance.
(7) S 085-008Remove the multimeter from the RVDT assembly.
(8) S 865-009Remove the voltage source from the RVDT assembly.
(9) S 085-010Remove the rig pin.
S 425-011
(10) Do this task: "Flap Control Lever RVDT Assembly Installation" (Ref 27-51-07/401).
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A
747-400 MAINTENANCE MANUAL
FLAP CONTROL LEVER - REMOVAL/INSTALLATION
_________________________________________
1. General_______
A. There are two tasks in this procedure. There is one task for the removal and one task for the installation of the flap control lever. The procedure has these parts:
(1)
The removal of the right cover from the pilot's control stand.
(2)
The removal of the flap control lever
(3)
The installation of the flap control lever
(4)
A test of the flap control lever.
TASK 27-51-08-004-001
2. Flap Control Lever Removal__________________________
A. References
(1)
AMM 29-11-00/201, Main Hydraulic Supply System
(2)
AMM 76-11-03/201, Control Stand
(3)
AIPC 27-51-10, Fig. 5
(4)
SSM 27-51-01
(5)
WDM 27-51-12
B.
Access
(1)
Location Zone
221/222 Control Cabin
C.
Procedure (Fig. 401)
S 864-002
(1)
Release the pressure in hydraulic systems No. 1 and No. 4 (AMM 29-11-00/201).
S 864-012
(2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6, Main Power Distribution Panel 1) 6L21, LE FLAP ELEC CONT CONT GRP B DRIVE 1 2) 6L22, LE FLAP ELEC CONT GRP A DRIVE 2 3) 6L23, LE FLAP ELEC CONT GRP A DRIVE 3
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