(2)
Examine the center electrode and the outer shell of the igniter plugs for erosion.
(3)
Replace the igniter plug(s) if the erosion is greater than the limits given in (Ref. Fig. 601/TASK 49-41-41-991-006)
(4)
Examine the barrel and the threads of the igniter plugs for corrosion and damage.
Igniter Plug Erosion Limits
Figure 601/TASK 49-41-41-991-006
CES 5. Close-up
________ Subtask 49-41-41-420-053
A. Install the igniter plugs (Ref. TASK 49-41-41-400-002).
ELECTRICAL LEAD - IGNITER PLUG - REMOVAL/INSTALLATION
_____________________________________________________ R **ON A/C 001-003, 051-099, 401-499,
TASK 49-41-43-000-001 Removal of the Electrical Lead - Igniter Plug (GTCP 36-300) WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______
WHEN YOU DO THE MAINTENANCE TASK(S).
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking caps
No specific circuit breaker(s) safety clip(s)
No specific access platform 2.5 m (8 ft. 2 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
29-00-00-864-001 Put the Related Hydraulic System in the Depressurized
Configuration before Maintenance Action
52-41-00-010-001 Open the APU Doors for Access
49-41-43-991-001 Fig. 401
3. Job Set-up
__________ Subtask 49-41-43-860-053
A. Aircraft Maintenance Configuration
(1)
On the panel 25VU, make sure that the APU MASTER SW pushbutton switch is off.
(2)
Put a warning notice in the cockpit to tell persons not to start the APU.
(3)
Make sure that hydraulic systems are depressurized
(Ref. TASK 29-00-00-864-001).
Subtask 49-41-43-865-050
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
Subtask 49-41-43-010-050
C. Get Access
(1)
Put the access platform in position below the APU access doors 315AL and 316AR.
(2)
Open the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-010-001).
4. Procedure
_________ (Ref. Fig. 401/TASK 49-41-43-991-001) Subtask 49-41-43-020-050
A. Removal of the Electrical Lead - Igniter Plug WARNING : DISCONNECT THE LOW TENSION ELECTRICAL SUPPLY 5 MINUTES BEFORE
_______ YOU START WORK ON THE IGNITION SYSTEM. ALSO, GROUND THE IGNITER LEAD WITH AN INSULATED DEVICE AS YOU DISCONNECT IT FROM THE IGNITER PLUG. HIGH CURRENT AND VOLTAGE, WHICH ARE USED IN THE IGNITION SYSTEM, CAN KILL YOU.
Electrical Lead - Igniter Plug.
Figure 401/TASK 49-41-43-991-001
CES
(1)
Remove and discard the lockwire from the electrical connector (1).
(2)
Disconnect the electrical connector (1).
(3)
Remove and discard the lockwire from the ignition electrical lead (2).
(4)
Disconnect and remove the ignition electrical lead (2) from the igniter plug (8031KM) (3) and the ignition unit (8030KM) (4).
(5)
Put blanking caps on the disconnected electrical connectors.
TASK 49-41-43-400-001
Installation of the Electrical Lead - Igniter Plug (GTCP 36-300)
WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______ WHEN YOU DO THE MAINTENANCE TASK(S).
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific Torque Wrench : range 0.00 to 1.20 m.daN
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