(6)
Remove and discard the cotter pin (11).
(7)
Remove the castle nut (12), the washer (10) and the bolt (15).
(8)
Push the diffuser (20) and the elbow (26) rearwards and remove it from the fitting (9).
Air Intake Diffuser and Elbow
Figure 401/TASK 49-16-45-991-004
CES
TASK 49-16-45-400-002
Installation of the Air Intake Diffuser and Elbow (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 -------------------------------------------------------------------------------
No specific corrosion resistant steel lockwire 0.8 mm Material No. 05-002 USA MIL-P-8116 PUTTY, ZINC CHROMATE GENERAL PURPOSE (Ref. 20-31-00) Material No. 05-005 USA MIL-C-16173 GRADE II CORROSION PREVENTIVE (Ref. 20-31-00)
Material No. 05-027 USA MIL-L-81309 RUST INHIBITOR(FOR CORROSION USE 15-004) (Ref. 20-31-00)
Material No. 06-001 USA MIL-L-23398 SOLID FILM LUBRICANT (NO LONGER PRODUCED) (Ref. 20-31-00)
Material No. 09-016 USA MIL-PRF-81733D TYPE II CLASS B CORROSION INHIBITING FILLET CONSISTENCY (Ref. 20-31-00)
C. Expendable Parts -------------------------------------------------------------------------------
FIG.ITEM --------- |DESIGNATION ---------------------------------------- |IPC-CSN------------------------------
11 cotter pin 49-16-04 04 -070
25 cotter pin 49-16-04 04 -070
D. Referenced Information
------------------REFERENCE -------------------------------DESIGNATION ------------------------------
-------------------------------------------------------------------------------
20-28-00-912-002 Electrical Bonding of Components With Conductive Bolts and Screws in the Tanks
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
52-41-00-010-001 Open the APU Doors for Access
52-41-00-410-001 Close the APU Doors after Access
49-16-45-991-004 Fig. 401
49-16-45-991-005 Fig. 402
49-16-45-991-006 Fig. 403
3. Job Set-up__________
Subtask 49-16-45-860-050
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 49-16-45-865-054
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. 401/TASK 49-16-45-991-004, 402/TASK 49-16-45-991-005, 403/TASK 49-16-45-991-006)
Subtask 49-16-45-560-050
A. Preparation of the Replacement Component
(Ref. Fig. 401/TASK 49-16-45-991-004)
(1)
Clean the component interface and/or the adjacent area.
(2)
Make an inspection for damage of the inner and outer surface of the diffuser (20) and the elbow (26). Examine the guide vanes in the elbow (26) for damage and unwanted matter. Replace or clean them as necessary.
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