A. Energize the aircraft electrical circuits. (Ref. TASK 24-41-00-861-002)
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B. Get Access
(1) Remove the access panel (Ref. TASK 53-35-13-000-002): R (a) FOR 8HB
-192KB, R (b) FOR 11HB
-191KB.
Subtask 21-51-00-941-052
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),
-
the ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are in the off position (the OFF legends are on) and,
-
the PACK 1 and the PACK 2 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.
4. Procedure
_________
Subtask 21-51-00-440-050
A. Reactivation of the Pack Flow-Control Valve
(1)
Remove and discard the the lockwire from the special screw (1).
(2)
Install the special screw (1) in the position (A) and safety it with corrosion-resistant steel lockwire 0.8 mm (0.032 in.) dia.
R (3) FOR 11HB
(a) Push the PACK 1 pushbutton switch to the on position (the FAULT and the OFF legends are off).
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R (4) FOR 8HB
(a) Push the PACK 2 pushbutton switch to the on position (the FAULT and the OFF legends are off).
Subtask 21-51-00-810-050
R R B. Do the trouble shooting of the flow control valve 11HB (8HB) (Ref. TSM ATA 21) and do the applicable corrective maintenance procedure(s).
5. Close-up________
Subtask 21-51-00-410-052
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):
R (a) FOR 8HB - 192KB,
R (b) FOR 11HB - 191KB.
Subtask 21-51-00-862-053
B. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 21-51-00Page 411 1201-299, 301-302, 1May 01/05 1 1 1CES 1R **ON A/C 106-149, 303-399, 401-499,
TASK 21-51-00-040-001-A
Deactivation 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 air conditioning 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. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific corrosion-resistant steel lockwire 0.8 mm
(0.0314 in.)
B. 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
R 1EFF : 106-149, 303-399, 401-499, 1 21-51-00Page 412 1 1 Aug 01/05 1 1 1CES 1 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R **ON A/C 401-499,
21-51-00-991-006 Fig. 402 R **ON A/C 106-149, 303-399, 401-499,
3. Job Set-up
__________
Subtask 21-51-00-861-056
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