B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 29-00-00-864-001 Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action 29-10-00-863-003 Pressurize the Blue Hydraulic System with a Ground Power Supply
29-10-00-864-003 Depressurize the Blue Hydraulic System R 55-33-13-010-002 Opening/Removal of the Trailing Edge Access-Panels R 325EL, 325ER, 325DL, 325DR, 325CL, 325CR, 325BL and R 325BR
27-26-17-991-001 Fig. 401
3. Job Set-up
__________
Subtask 27-26-17-860-051
A. Aircraft Maintenance Configuration
WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES
_______ ARE CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.
(1)
Pressurize the Blue hydraulic system with the electric pump. (Ref. TASK 29-10-00-863-003)
(2)
Put the rudder pedals in the neutral position.
(3)
Make sure that the RUD TRIM indicator on the panel 110VU of the center pedestal shows zero.
(4)
Release the FLT CTL/FAC 1 pushbutton switch on the overhead panel 23VU and the OFF legend comes on.
(5)
Release the FLT CTL/FAC 2 pushbutton switch on the overhead panel 24VU and the OFF legend comes on.
(6)
Put the warning notices in the cockpit to tell persons not to operate the flight controls.
(7)
Depressurize the Blue hydraulic system (Ref. TASK 29-10-00-864-003).
Subtask 27-26-17-865-050
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU AUTO FLT/FAC1/28VDC 5CC1 B04 49VU AUTO FLT/FAC1/26VAC 14CC1 B03 121VU AUTO FLT/FAC2/28VDC 5CC2 M19 121VU AUTO FLT/FAC2/26VAC 14CC2 M18
Subtask 27-26-17-860-050
C. Aircraft Maintenance Configuration
(1) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration. (Ref. TASK 29-00-00-864-001)
(2) De-energize the aircraft electrical circuits. (Ref. TASK 24-41-00-862-002)
(3) Put the warning notices in position to tell persons not to operate the hydraulic systems.
R Subtask 27-26-17-010-050-A
R D. Get Access
R (1) Put the adjustable access platform in position.
R R (2) Open the access panels 325BL, 325BR at the trailing edge of the vertical stabilizer (1) (Ref. TASK 55-33-13-010-002).
Subtask 27-26-17-480-050
E. Installation of the Rigging Pins
(1) Put the rigging pin 98D27207516330 (5), part of RIGGING PIN SET (98D27207516000), or the PIN - RIGGING (98D27207549000) in the bellcrank of the yaw damper.
(2) Put the rigging pin 98D27207516330 (4), part of the RIGGING PIN SET (98D27207516000), or the PIN - RIGGING (98D27207548000) in the bellcrank of the rudder control unit.
4. Procedure
_________
(Ref. Fig. 401/TASK 27-26-17-991-001) Subtask 27-26-17-020-050
A. Removal of the Yaw Damper Position Transducer Unit 2CC
(1) Disconnect the electrical connectors (18) from the plugs (19) on the transducer unit 2CC (3).
NOTE : Do not disconnect the bonding jumpers (17) from the electrical
____ connectors (18) unless a repair or a new installation is necessary.
(2)
Put the blanking caps on the electrical connectors (18) and the plugs (19).
(3)
Disconnect the push-rod (13) from the transducer unit 2CC (3) as follows:
(a)
Remove and discard the cotter pin (9).
(b)
Remove the nut (10), the washer (11) and the bolt (22) from the connection of the transducer lever (12) and the push-rod (13).
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