(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 49-41-41-865-055
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 49-41-41-010-053
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 49-41-41-991-004) Subtask 49-41-41-020-052
A. Removal of the 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.
NOTE : There are two igniter plugs mounted in the combustion casing, one
____ at 270 degrees and one at 120 degrees viewed from the rear. The removal procedure is the same for both.
(1)
Ground the igniter cables with an insulated device.
(2)
Disconnect the LT supply P10 from the ignition exciter.
(3)
Disconnect the igniter cable(s) (1) from the igniter plug(s).
(4)
Remove the igniter plug(s) (2) from the combustor assembly.
Igniter Plug
Figure 401/TASK 49-41-41-991-004
CES TASK 49-41-41-400-002
Installation of the Igniter Plug(s) (APS 3200)
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 5.00 to 35.00 lbf.in
(0.05
to 0.40 m.daN) No specific Torque Wrench : range 36.00 to 220.00 lbf.in
(0.40 to 2.60 m.daN)
B.
Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 04-014 USA MIL-PRF-907 HIGH TEMPERATURECOMPOUND (Ref. 20-31-00)
C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
29-00-00-864-001 Put the Related Hydraulic System in the Depressurized
Configuration before Maintenance Action 49-00-00-710-005 Self-Test of the ECB (APS 3200) 52-41-00-010-001 Open the APU Doors for Access 52-41-00-410-001 Close the APU Doors after Access 49-41-41-991-004 Fig. 401
3. Job Set-up
__________ Subtask 49-41-41-860-051
A. Aircraft Maintenance Configuration
(1)
On the panel 25VU make sure that the APU MASTER SW pushbutton switch is off.
(2)
Make sure that there is 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).
(4)
Make sure that the access platform is in position below the APU compartment.
(5)
Make sure that the APU access doors are open (Ref. TASK 52-41-00-010-001).
(6)
Make sure that the igniter leads are grounded with an insulated device.
(7)
Make sure that the LT supply P10 connector is disconnected. Subtask 49-41-41-865-056
B.
Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
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