(2)
On the panel 25VU, make sure that the APU MASTER SW p/bsw is OFF.
(3)
Put a warning notice in the cockpit to tell persons not to start the APU.
(4)
Obey the fuel safety procedure (Ref. TASK 28-00-00-910-001).
(5)
Make sure that hydraulic systems are depressurized
(Ref. TASK 29-00-00-864-001).
Subtask 49-31-41-865-056
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 49-31-41-010-053
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).
(3)
Set the LIGHT control SW 11LJ to the ON position.
R EFF : 001-049, 101-105, 107-107, 151-199, 49-31-41Page 202 201-210, Config-2 Aug 01/05
CES 4. Procedure
_________
(Ref. Fig. 201/TASK 49-31-41-991-003) Subtask 49-31-41-020-057
A. Removal of the Nozzles NOTE : Do not remove all the fuel nozzles at the same time. The nozzles
____
keep the correct combustor assembly aligned.
(1)
Remove the safety pins (7) from the fuel nozzle bolts (5).
(2)
Remove the locking plate (6).
(3)
Put the container below the fuel manifold assembly.
(4)
Disconnect the fuel supply pipes for the primary manifold (10) and the secondary manifold (8) at the flow divider.
(5)
Let the unwanted fuel drain into the container.
(6)
Put blanking plugs on the disconnected line ends.
(7)
Disconnect the manifold connectors (4) at the fuel nozzle (3).
(8)
Remove the bolts (5), the nozzle (3), the gasket (2) and the air shroud (1).
(9)
Discard the gasket (2).
(10) Remove the container.
R EFF : 001-049, 101-105, 107-107, 151-199, 49-31-41Page 203 201-210, Config-2 Aug 01/05
CES
Fuel Nozzles and Manifolds
Figure 201/TASK 49-31-41-991-003
CES TASK 49-31-41-200-004 Inspection/ Check of the Primary and Secondary Fuel-Nozzle (131-9(A)) 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. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
49-31-41-000-003 Removal of the Primary and Secondary Fuel-Nozzle (131-9(A)) 49-31-41-400-003 Installation of the Primary and Secondary Fuel-Nozzle (131-9(A)) 49-31-41-991-003 Fig. 201
3. Job Set-up
__________ Subtask 49-31-41-020-058
A. Remove the fuel nozzles (Ref. TASK 49-31-41-000-003)
4. Procedure
_________ (Ref. Fig. 201/TASK 49-31-41-991-003) WARNING : USE A PROTECTIVE EYE SHIELD/GOGGLES WHEN YOU USE COMPRESSED AIR.
_______
DEBRIS AND/OR HIGH PRESSURE AIR CAN DAMAGE YOUR EYES.
Subtask 49-31-41-210-052
A. Inspection of the Fuel Nozzles
(1)
Make sure that the fuel-nozzle inlet connections (4) are not damaged, or blocked with carbon deposits.
(2)
Examine the nozzle mounting flange (3) and make sure that there is no damage.
R EFF : 001-049, 101-105, 107-107, 151-199, 49-31-41Page 205 201-210, Config-2 Aug 01/05
CES
(3)
Examine the atomizer assembly for damage or carbon deposits. None is permitted.
(4)
Blow filtered air through each nozzle connection. Make sure that there are no blockages.
NOTE : If a blockage is found replace the nozzle assembly.
____
________
5. Close-up
Subtask 49-31-41-420-056
A. Install the fuel-nozzles (Ref. TASK 49-31-41-400-003).
R EFF : 001-049, 101-105, 107-107, 151-199, 49-31-41Page 206 201-210, Config-2 Aug 01/05
CES
TASK 49-31-41-400-003
Installation of the Primary and Secondary Fuel- Nozzle (131-9(A))
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