SENSING ELEMENT - OVERHEAT, APU (11HF,12HF,13HF,14HF,15HF,16HF,17HF,18HF,19HF,
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20HF,84HF) - REMOVAL/INSTALLATION
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TASK 36-22-17-000-001
Removal of the APU Overheat Sensing-Elements
WARNING : MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START
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WORK ON THE PNEUMATIC SYSTEM.
NOTE : The removal procedure for all sensing elements of the leak detection
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system (single loop 125 degree) is the same.
1.
Reason for the Job
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Self Explanatory
2.
Job Set-up Information
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A. Fixtures, Tools, Test and Support Equipment
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REFERENCE QTY DESIGNATION
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No specific circuit breaker(s) safety clip(s)
No specific adjustable access platform 2.5 m (8 ft. 2 in.)
No specific access platform 3.0 m (9 ft. 10 in.)
B. Referenced Information
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REFERENCE DESIGNATION
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25-55-11-000-001 Removal of the AFT Cargo-Compartment Partition FR47 25-55-12-000-001 Removal of the AFT Cargo Compartment Partition FR65 52-30-00-860-001 Open the FWD or AFT Cargo-Compartment Door with the
Yellow Electric Pump
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
36-22-17-991-001 Fig. 401 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
**ON A/C 301-399,
36-22-17-991-001-A Fig. 401A
**ON A/C ALL
3. Job Set-up
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Subtask 36-22-17-865-050
A. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU AIR BLEED/X FEED/VALVE/BAT 2HV D13 49VU AIR BLEED/ENG 1/CTL 3HA1 D12 49VU AIR BLEED/ENG 1/MONG 2HA1 D11 122VU AIR BLEED/ENG 2/CTL 3HA2 Z23 122VU AIR BLEED/ENG 2/MONG 2HA2 Z22 122VU AIR BLEED/X FEED VALVE/NORM 1HV Z20
R **ON A/C 001-049, 051-099, 101-149, 201-299,
Subtask 36-22-17-010-050
B. Get Access NOTE : To remove the necessary APU overheat sensing elements, remove only
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the related access panels.
(1)
Get access to the overheat sensing elements between FR49 and FR50:
(a)
Put the adjustable access platform in position.
(b)
Remove the access panel 197BB.
(2)
Get access to the APU overheat sensing elements between FR46 and FR70 from the AFT cargo compartment:
(a)
Open the AFT cargo compartment door (Ref. TASK 52-30-00-860-001).
(b)
Remove the applicable access panels for the APU overheat sensing elements:
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between the FR46 and FR47 remove the partition panel 151BW (Ref. TASK 25-55-11-000-001)
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between the FR47 and FR49
remove the access panel 151CW
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between the FR49 and FR52
remove the access panel 151DW
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between the FR52 and FR55
remove the access panel 151EW
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between the FR55 and FR58
remove the access panel 151HW
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between the FR58 and FR59
remove the access panel 151JW
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between the FR59 and FR62
remove the access panel 161AW
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between the FR62 and FR63
remove the access panel 161BW
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between the FR63 and FR65
remove the access panel 161CW
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between the FR65 and FR70 remove the partition panel 161DW (Ref. TASK 25-55-12-000-001).
(3)
Get access to the APU overheat sensing elements aft of FR70.
(a)
Put the access platform below the rear fuselage.
(b)
Open the applicable access door for the APU overheat sensing elements:
-between the FR70 and FR77
open the access door 312AR,
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