(7)
Hold the contactor (8).
(8)
Remove the 4 nuts (7) and the washers (9).
(9)
Remove the contactor (8).
Contactor Figure 401/TASK 24-25-55-991-001
1EFF : 1 1R 1CES ALL 1 11 1 24-25-55 Page 404 Feb 01/99
TASK 24-25-55-400-001
Installation of the AC Essential Bus Switching Contactor (3XC)
WARNING : MAKE SURE THAT NO AC OR DC POWER IS CONNECTED TO THE AIRCRAFT
_______
ELECTRICAL CIRCUITS.
THERE IS A RISK OF ELECTROCUTION IF THE AC OR DC POWER STAYS
CONNECTED.
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific access platform
No specific warning notice R No specific Torque Wrench : range 0.00 to 1.20 m.daN R (0.00 to 9.00 lbf.ft)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-25-00-710-001 Operational Test of the AC Essential Generation
Switching
24-25-55-991-001 Fig. 401
3. Job Set-up
__________
Subtask 24-25-55-860-050
A. Aircraft Maintenance Configuration
(1)
In the cockpit, on the overhead panel 35VU, make sure that these puhbutton switches are released:
-BAT 1, BAT 2,
-GEN 1, GEN 2,
-EXT A.
(2)
In the cockpit, make sure that the warning notice is in position to tell persons not to operate the pushbutton switches on these panels of the overhead panels:
-35VU (ELEC),
-21VU (EMER ELEC PWR).
(3)
Make sure that the external power connector is not connected to the aircraft receptable EXT PWR A.
(4)
On the access door 121AL, make sure that the warning notice is in position to tell persons not to connect the external power connector.
(5)
Make sure that the access platform is in position at the access door
812.
(6)
Make sure that the access door 812 is open.
(7)
In the avionics compartment, make sure that the access door (14) is removed from the panel 106VU.
Subtask 24-25-55-865-050
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------105VU ELEC/CSM/G /EV AUTO/SPLY 7XE C01 106VU CSM/G /EV/MAN/SPLY 6XE B04 106VU ESS TR/SPLY 4PE C01 122VU ELEC/CNTOR/ESS/DC BUS/TIE 3PC W26 123VU AC ESS/BUS ON/BUS 1 1XC AC12 123VU AC ESS/BUS ON/BUS 2 2XC AC01
4. Procedure_________
(Ref. Fig. 401/TASK 24-25-55-991-001)
Subtask 24-25-55-420-050
A. Installation of the Contactor
(1)
Clean the component interface and/or the adjacent area.
(2)
Do an inspection of the component interface and/or the adjacent area.
1EFF : ALL 1 24-25-55Page 406 1 1 May 01/05R 1 1 1CES 1
(3)
Put the contactor (8) in position on the studs (11).
(4)
Install the washers (9) and the nuts (7), then tighten the nuts.
(5)
Install the electrical wires: CAUTION : REFER TO THE MATCH MARKS MADE DURING THE REMOVAL WHEN YOU
_______
CONNECT THE ELECTRICAL WIRES. R INCORRECT CONNECTION OF THE WIRES WILL CAUSE DAMAGE TO R EQUIPMENT.
(a)
Install the electrical power-supply wires (6).
(b)
Install the plates (5) and (10), the spring washers (4) and the nuts (3),
(c)
TORQUE the nuts (3) to between 0.147 and 0.176 m.daN (13.00 and
15.57 lbf.in).
(6)
Remove the blanking caps from the electrical connectors.
(7)
Make sure that the electrical connectors are clean and in the correct condition.
(8) Connect the 2 electrical connectors (1, 2).
Subtask 24-25-55-865-051
