A. Energize the aircraft electrical circuits. (Ref. TASK 24-41-00-861-002) Subtask 21-51-00-010-056
B. Get Access
(1)
Remove the access panel (Ref. TASK 53-35-13-000-002):
(a) For PACK 1
-191KB.
(2)
For PACK 2
-192KB,
Subtask 21-51-00-941-055
C. Safety Precautions
(1)
On the panel 30VU:
(a)
Make sure that:
-
the APU BLEED pushbutton switch is in the off position (the ON legend is off) and,
-
the ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are in the off position (the OFF legends are on).
(b)
Put a warning notice in position to tell persons not to operate these switches.
(2)
On the HP ground connector put a warning notice in position to tell persons not to supply the ground air.
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D. ECAM Warning Check before Deactivation
(1) On the Upper ECAM E/WD make sure that the warnings which follow are not shown:
-
AIR PACK 1 REGUL FAULT or AIR PACK 2 REGUL FAULT,
-
AIR COND CTL 1-A FAULT or AIR COND CTL 2-A FAULT,
-
AIR COND CTL 1-B FAULT or AIR COND CTL 2-B FAULT.
4. Procedure
_________
Subtask 21-51-00-040-051
A. Deactivation of the Air Conditioning Pack WARNING : DO NOT TOUCH THE COMPONENT UNTIL IT IS SUFFICIENTLY
_______
COOL TO PREVENT BURNS.
(1)
For PACK 1
(a) Push the PACK 1 pushbutton switch to the off position (the OFF legend comes on).
(2)
For PACK 2
(a) Push the PACK 2 pushbutton switch to the off position (the OFF legend comes on).
(3) On the related flow control unit 23HB (24HB): R **ON A/C 401-499,
(Ref. Fig. 402/TASK 21-51-00-991-006) R **ON A/C 106-149, 303-399, 401-499,
(a)
Remove the blanking cap (1) from the position (A). NOTE : This will vent the pack flow-control unit and close the
____
butterfly valve.
(b)
Make sure that the forked valve-position indicator lever (2) is at the CLOSED position.
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Pack FlowControl Unit - Component Location
Figure 402/TASK 21-51-00-991-006
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(c)
Install the blanking cap (1) between the forks of the valve-position indicator lever (2) and on the screwed boss (B).
(d)
Safety the blanking cap (1) with corrosion-resistant steel lockwire 0.8 mm (0.0314 in.) dia.
5. Close-up
________ Subtask 21-51-00-410-056
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Install the access panel (Ref. TASK 53-35-13-400-002) :
(a)
For PACK 1
-191KB.
(b)
For PACK 2
-192KB,
(3)
Remove the warning notice(s).
(4)
Record the deactivation of the air conditioning pack in the aircraft technical log book.
Subtask 21-51-00-862-055
B. De-energize the aircraft electrical circuits. (Ref. TASK 24-41-00-862-002)
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Reactivation of the Air Conditioning Pack
WARNING : MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM
_______ FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE. HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.
NOTE : The procedure is the same for both packs 10HM (11HM)
____
1. Reason for the Job
__________________
Refer to the MMEL TASK: 21-52-01
Air cooling system
Air conditioning pack
2. Job Set-up Information
______________________
A. 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 53-35-13-000-002 Removal of the Quick-Release Access Panels from the Belly Fairing Structure 53-35-13-400-002 Installation of the Quick-Release Access Panels on the Belly Fairing Structure TSM ATA 21 (for corrective action)
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