B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-42-00-861-001 Energize the Ground Service Network 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 26-13-15-991-001 Fig. 401 26-13-15-991-002 Fig. 402
3. Job Set-up
__________ Subtask 26-13-15-861-050
A. Aircraft Maintenance Configuration
(1)
Put a warning notice on the panel 25VU to tell presons not to start the APU.
(2)
Energize the ground service network
(Ref. TASK 24-42-00-861-001).
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(3) De-pressurize the hydraulic systems (Ref. TASK 29-00-00-864-001).
Subtask 26-13-15-865-050
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/FIRE AND OVHT/DET/LOOP B 2WG L44 121VU APU/FIRE AND OVHT/DET/LOOP A 1WG L43 121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
R 121VU APU/FIRE/EXTIG/SQUIB/B 2WF L39
R 121VU APU/FIRE/EXTIG/SQUIB/A 1WF L38 121VU APU/FIRE/LP VALVE/NORM 4WF M42 121VU APU/FIRE/LP VALVE/STBY 3WF M41
Subtask 26-13-15-010-050
C. Get Access
(1)
Put the access platform in position below the APU compartment.
(2)
Open the maintenace door 314AR.
(3)
Open the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-010-001)
(4)
Set the LIGHT control switch 11LJ to the ON position.
4. Procedure
_________
(Ref. Fig. 401/TASK 26-13-15-991-001, 402/TASK 26-13-15-991-002)
Subtask 26-13-15-020-050
A. Removal of the APU Fire Sensors NOTE : The procedure is the same for the APU fire sensors 21WG and 22WG.
____
(1)
Turn the screws (2) and open the dual clamps (3).
(2)
Keep the support bushes (1).
(3)
Disconnect the electrical connector 21WG(22WG)-A (9).
(4)
Put blanking caps on the disconnected electrical connectors.
(5)
Remove the screws (4) and the washers (5).
(6)
Disconnect the fire/overheat detector 21WG(22WG) (6) with the sensing element.
(7)
Remove and discard the O-rings (7).
(8)
Put blanking caps on the disconnected electrical connectors.
Sensing Elements of the APU Fire Detector
Figure 401/TASK 26-13-15-991-001
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Sensing Elements - Installation
Figure 402/TASK 26-13-15-991-002
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TASK 26-13-15-400-001
Installation of the Sensing Elements 21WG and 22WG
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
R No specific access platform 3.5 m (11 ft. 6 in.)
B. Expendable Parts
-------------------------------------------------------------------------------
FIG.ITEM |DESIGNATION |IPC-CSN
-------------------------------------------------------------------------------
0-rings 26-13-15 01 -010
C. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
24-42-00-861-001 Energize the Ground Service Network from the External Power 24-42-00-862-001 De-energize the Ground Service Network Supplied from the External Power 29-00-00-864-001 Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action 29-14-00-614-002 Pressurization of the Hydraulic Reservoirs through
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