(4)
Put a warning notice in the cockpit to tell persons not to start the APU.
Subtask 49-00-00-865-092
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 49-00-00-010-063
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 and 316AR (Ref. TASK 52-41-00-010-001).
(3)
Set the LIGHT control switch 11LJ to the on position.
(4)
Open the maintenance door 314AR (Ref. TASK 52-41-23-000-001) Subtask 49-00-00-210-061
D.
Visually Inspect the APU for Oil/Fuel Leaks.
(1)
Inspect the APU and plumbing for oil/fuel leaks. If leak(s) are apparent:
(a)
Locate and repair all oil/fuel leaks.
(b)
Clean the APU externally.
(c)
Clean the APU compartment.
(d)
Clean the APU access doors internally and externally.
(e)
Clean the APU air intake flap internally/externally as necessary.
(2)
Check for oil/fuel migration externally/internally into the APU air intake duct. If the air intake and air intake duct are found to be contaminated, clean the air intake duct (Ref. TASK 49-16-00-100-002).
5. Close-up
________ Subtask 49-00-00-410-067
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Set the LIGHT control switch 11LJ to the off position.
(3)
Close the APU access doors 316AR, 315AL (Ref. TASK 52-41-00-410-001).
(4)
Close the maintenance access door 314AR (Ref. TASK 52-41-23-400-001).
(5)
Remove the access platform(s).
(6)
Remove the warning notice(s). Subtask 49-00-00-865-093
B.
Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.
Subtask 49-00-00-860-072
C. Aircraft Maintenance Configuration
(1) De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002).
TASK 49-00-00-790-005
Air Leak Test with closed APU Doors
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s)
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 19-010 USA AMS 5687 LOCKWIRE STAINLESS STEEL ANNEALED 0.8MM DIA (Ref. 20-31-00)
C. 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 29-14-00-614-001 Depressurization of the Hydraulic Reservoirs 29-14-00-614-002 Pressurization of the Hydraulic Reservoirs through
the Ground Connector 49-00-00-860-005 APU Start by External Power (APS 3200) 49-00-00-860-006 APU Shutdown 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 49-00-00-991-014 Fig. 501
3. Job Set-up
__________ Subtask 49-00-00-860-103
A. Aircraft Maintenance Configuration
(1)
Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002).
(2)
On the panel 25VU, make sure that the APU MASTER SW pushbutton switch is off.
(3)
Put a warning notice in the cockpit to tell persons not to start the APU.
(4)
Make sure that hydraulic systems are depressurized
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