(3)
Make sure that ground fire extinguishing equipment is available.
(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 this(these) circuit breaker(s) is(are) open, safetied and tagged 1KD, 2KD. _________
4. Procedure
Subtask 49-72-15-110-050
A. Cleaning of the thermocouple probe (8057KM1) or (8057KM2)
(1)
Clean the thermocouple probe (8057KM1) or (8057KM2) with a lint free cloth. Use solvent CLEANING AGENTS (Material No. 11-002) on the cloth.
(2)
Clean the thermocouple probe electrical connections with a soft fibre bristle brush. Use solvent CLEANING AGENTS (Material No. 11-004) on the brush.
(3)
Let the thermocouple probe (8057KM1) or (8057KM2) dry.
TASK 49-72-15-200-001
Inspection/Check of the Thermocouple Probes (8057KM1) and (8057KM2) (GTCP 36-300)
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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
3. Job Set-up
__________ Subtask 49-72-15-860-056
A. Aircraft Maintenance Configuration
(1)
On the panel 25VU make sure that the APU MASTER SW pushbutton switch is off.
(2)
Make sure that there is a warning notice in the cockpit to tell persons not to start the APU.
(3)
Make sure that ground fire extinguishing equipment is available.
(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 this(these) circuit breaker(s) is(are) open, safetied and tagged 1KD, 2KD.
4. Procedure
_________
Subtask 49-72-15-210-050
A. Inspection/Check of the Thermocouple Probe (8057KM1) or (8057KM2)
(1) Do a visual check of the thermocouple probe and make sure that:
-there are no dents or cracks,
-
the thermocouple probe is not bent,
-
the threads on the electrical connectors are not damaged or worn,
-
the thermocouple probe is not damaged,
-there are no holes in the thermocouple probe.
NOTE : Replace the thermocouple probe if damage is found.
____
(2) Do an electrical resistance check of the thermocouple probe and make sure that:
-
the thermocouple probe has loop resistance,
-
the loop resistance between the electrical terminals is not more than 1.0 Ohm maximum,
-
the insulation resistance between the electrical terminals and the case of the thermocouple probe is not less than 10 K Ohms.
NOTE : Replace the thermocouple probe if the results of the
____
electrical checks are unsatisfactory.
TASK 49-72-15-400-001 Installation of the Thermocouple Probes (8057KM1) and (8057KM2) (GTCP 36-300) 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 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 -------------------------------------------------------------------------------
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