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 21-43-00-991-001 Fig. 402
3. Job Set-up
__________
Subtask 21-43-00-861-060
A. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
1EFF : ALL 1 21-43-00Page 411 1 1 May 01/04R 1 1 1CES 1
Subtask 21-43-00-865-061
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------
PANEL DESIGNATION FIN LOCATION
-------------------------------------------------------------------------------
122VU AIR COND/AFT CARGO VENT/CTL AND/MONG 31HN 20 S
or alternative location :-
49VU AIR COND/AFT CARGO/VENT/CTL & MONG 31HN 07 C
Subtask 21-43-00-941-059
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.
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
Subtask 21-43-00-010-056
D. Get Access
(1)
Put the access platform in position at the access panel 197BB.
(2)
Remove the access panel 197BB (Ref. TASK 53-35-13-000-002).
R **ON A/C 301-399,
R Subtask 21-43-00-010-056-A
R D. Get Access
R (1) Put the access platform in position at the access panel 197KB.
R (2) Remove the access panel 197KB (Ref. TASK 53-35-13-000-002).
R **ON A/C ALL
4. Procedure_________
(Ref. Fig. 402/TASK 21-43-00-991-001)
Subtask 21-43-00-040-052
A. Deactivation of the AFT Cargo Compartment-Heating Pressure Regulating Valve
WARNING : DO NOT TOUCH THE COMPONENT UNTIL IT IS SUFFICIENTLY_______ COOL TO PREVENT BURNS.
(1) Turn the manual overide handwheel (2) to close the pressure regulating valve.
(2) Engage the locking device on the manual overide handwheel (2) to safety the pressure regulating valve in the closed position.
(3) Disconnect the electrical connector (1) and temporarily attach it to the aircraft structure.
(4) Put blanking caps on the disconnected electrical connectors.
5. Close-up________
Subtask 21-43-00-865-076
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 31HN.
AFT Cargo Compartment-Heating Pressure-Regulating Valve Figure 402/TASK 21-43-00-991-001
1EFF : ALL 1 21-43-00Page 414 1 1 May 01/04R 1 1 1CES 1
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
Subtask 21-43-00-410-055
B. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Install the access panel 197BB (Ref. TASK 53-35-13-400-002).
(3)
Remove the access platform(s).
(4)
Remove the warning notice(s).
(5)
Put a warning notice in the cockpit to tell the flight crew that the pressure regulating valve is deactivated.
(6)
Record the deactivation of the pressure regulating valve in the aircraft technical log book.
**ON A/C 301-399,
Subtask 21-43-00-410-055-A
B. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Install the access panel 197KB (Ref. TASK 53-35-13-400-002).
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