NOTE : If a blockage is found replace the nozzle assembly.
____
________
5. Close-up
Subtask 49-31-42-420-053
A. Install the main fuel nozzles and manifold (Ref. TASK 49-31-42-400-005)
TASK 49-31-42-400-005 Installation of the Main Fuel Nozzles and Manifold (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 0.00 to 1.20 m.daN
(0.00 to 9.00 lbf.ft)
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 04-014 USA MIL-PRF-907 HIGH TEMPERATURECOMPOUND (Ref. 20-31-00)
C. Expendable Parts
-------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
gaskets 49-31-04 50 -090
D. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 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 49-00-00-860-005 APU Start by External Power (APS 3200) 52-41-00-010-001 Open the APU Doors for Access 52-41-00-410-001 Close the APU Doors after Access 49-31-42-991-001 Fig. 201
3. Job Set-up
__________
Subtask 49-31-42-860-050
A. Aircraft Maintenance Configuration
(1)
Make sure that the aircraft electrical circuits are energized (Ref. TASK 24-41-00-861-002).
(2)
On the panel 25VU, make sure that the APU MASTER SW pushbutton switch is off.
(3)
Make sure that there is a warning notice in the cockpit to tell persons not to start the APU.
(4)
Make sure that hydraulic systems are depressurized
(Ref. TASK 29-00-00-864-001).
(5)
Make sure that the access platform is in position below the APU compartment.
(6)
Make sure that the APU access doors are open (Ref. TASK 52-41-00-010-001).
(7)
Make sure that the LIGHT control switch 11LJ is set to the on position.
Subtask 49-31-42-865-057
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
4. Procedure
_________
(Ref. Fig. 201/TASK 49-31-42-991-001) Subtask 49-31-42-420-052
A. Installation of the Nozzles and Manifold
(1)
Remove all the blanking caps.
(2)
Install the new gaskets (1) on the nozzles (2).
(3)
Install the nozzles (2) with the new gasket (1) in the combustor casing mount boss (5).
(4)
Apply lubricant COMMON GREASE (Material No. 04-014) to the bolts (3).
(5)
Install the bolts (3) and secure the nozzles (2).
(6)
TORQUE the bolts (3) to between 0.57 and 0.63 m.daN (50.44 and 55.75 lbf.in)
(7)
Connect the manifold connector (4) to the nozzle (2).
(8)
TORQUE the manifold nuts (4) to between 1.07 and 1.19 m.daN (94.69 and 105.30 lbf.in).
(9)
Repeat steps (2) thru (8) at the remaing five main nozzles.
(10)
Install the clamps (7) with the bolts (6) and nuts (8).
(11)
Repeat step (10) at the remaing three clamp positions.
(12)
TORQUE the nuts (8) to between 0.57 and 0.63 m.daN (50.44 and 55.75 lbf.in)
(13)
Connect the manifold connector (9) to the fuel flow divider, torque tighten to the same value as in step (8).
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