(1)
Before you disconnect the two igniter cables, disconnect the low tension connector P10 and wait for 5 minutes.
(2)
Ground the the igniter leads with an insulated device before you disconnect them from the igniter unit.
Subtask 49-41-38-860-050
B. Aircraft Maintenance Configuration
(1)
On the panel 25VU, make sure that the APU MASTER SW pushbutton switch is off, then wait 7.5 minutes before you do the procedure.
(2)
Put a warning notice in the cockpit to tell persons not to push the APU MASTER SW pushbutton switch to on.
(3)
Make sure that hydraulic systems are depressurized
(Ref. TASK 29-00-00-864-001)
Subtask 49-41-38-865-055
C. 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 121VU APU/FIRE/EXTIG/SQUIB/B 2WF L39 121VU APU/FIRE/EXTIG/SQUIB/A 1WF L38 121VU APU/FIRE/LP VALVE/NORM 4WF M42 121VU APU/FIRE/LP VALVE/STBY 3WF M41 121VU APU/FUEL/LP VALVE/CTL 1QF M40
Subtask 49-41-38-010-052
D. Get Access
(1)
Put the access platform in position below the APU access doors 315AL and 316AR.
(2)
Open the APU access doors 315AL and 316AR (Ref. TASK 52-41-00-010-001).
4. Procedure
_________ (Ref. Fig. 401/TASK 49-41-38-991-003) Subtask 49-41-38-020-051
A. Removal of the Ignition Unit 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.
(1)
Disconnect the electrical connector P10 (4) from the ignition unit (3), wait 5 minutes before doing steps (2) to (4).
(2)
Disconnect the igniter cables (2) from the ignition unit (3).
(3)
Put blanking caps on the disconnected electrical connectors.
(4)
Loosen the bolts (1), but do not remove them. Remove the ignition unit (3).
Ignition Unit (APS 3200)
Figure 401/TASK 49-41-38-991-003
CES TASK 49-41-38-400-002
Installation of the Ignition Unit (8030KM) (APS 3200)
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. 03-002 GB DEF-STAN 91-101
LUBRICATING OIL TURBINE ENGINE SYNT BASE
(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 49-41-38-991-003 Fig. 401
3. Job Set-up
__________ Subtask 49-41-38-860-051
A. Aircraft Maintenance Configuration
(1)
Make sure that the access platform is in position below the APU compartment.
(2)
Make sure that the APU access doors 315AL and 316AR are open (Ref. TASK 52-41-00-010-001).
(3)
Make sure that there is a notice in the cockpit to tell persons not to switch the APU MASTER SW pushbutton switch ON.
(4)
Make sure that hydraulic systems are depressurized
(Ref. TASK 29-00-00-864-001).
(5)
Make sure that the ignition leads are grounded with an insulated device.
Subtask 49-41-38-865-058
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