SENSING ELEMENT - OVERHEAT, APU - INSPECTION/CHECK
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TASK 36-22-17-200-001
Detailed Inspection of the APU Overheat Sensing Elements
1. Reason for the Job
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Detailed inspection of the duct-leak/sensing element detection system, for example, after a duct leak warning.
2. Job Set-up Information
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A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s)
No specific warning notice(s)
No specific access platform 3.0 m (9 ft. 10 in.)
No specific adjustable access platform 3.6 m (11 ft. 10 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
20-28-00-912-006 Electrical Bonding of Pipes 25-55-12-000-001 Removal of the AFT Cargo Compartment Partition FR65 25-55-12-400-001 Installation 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 52-30-00-860-002 Close the FWD or AFT Cargo-Compartment Door with the
Yellow Electric Pump 36-22-17-991-002 Fig. 601 36-22-17-991-003 Fig. 602 36-22-17-991-004 Fig. 603 36-22-17-991-005 Fig. 604 36-22-17-991-007 Fig. 605
1EFF : ALL 1 36-22-17Page 601 1 1 Feb 01/00R 1 1 1CES 1
3. Job Set-up
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Subtask 36-22-17-865-053
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
Subtask 36-22-17-860-051
B. Aircraft Maintenance Configuration
(1) Put the warning notice(s) in position:
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in the cockpit on the engine control panel 115VU to tell persons not to start the engine(s),
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in the cockpit on the AIR COND overhead control panel 30VU to tell persons not to push the APU BLEED pushbutton switch,
- on the HP ground connector to tell persons not to pressurize the pneumatic system.
(2) Put the adjustable access platform in position.
R **ON A/C 001-049, 051-099, 101-149, 201-299, 301-399,
Subtask 36-22-17-010-051-A
C. Get Access
(1)
Get access to the APU overheat sensing elements between FR49 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 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).
(2)
Get access to the APU overheat sensing elements aft of FR70.
(a)
Put the access platform below the rear fuselage.
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