-
in the cockpit on the AIR COND. Overhead Control-Panel 30VU to tell persons not to push in the APU BLEED pushbutton switch,
- on the HP ground connector 7300HM to tell persons not to pressurize the pneumatic system.
(2) Put the access platform(s) in position.
Subtask 36-12-51-010-051
C. Remove the access panel 197BB.
Subtask 36-12-51-020-054
D. Remove the APU Bleed Check-Valve (Ref. TASK 36-12-51-000-001).
4. Procedure
_________
(Ref. Fig. 601/TASK 36-12-51-991-002)
Subtask 36-12-51-210-050
A. Inspection of the APU Bleed Check-Valve
R R R R R (1) Make sure that the APU Bleed Check-Valve is complete. If parts are missing (flaps, shaft and/or spring): - Do an inspection of the APU bleed-air system and the air conditioning system to find this (these) parts before you install a new APU Bleed Check-Valve.
R (2) Examine the APU Bleed Check-Valve for damage.
R (3) Make sure that the flaps open and close freely without stops.
R (4) Measure the play between the valve flaps and the hinge pin in the radial direction.
R (5) Make sure that the play is not more than 0.030 in. (0.7619 mm).
R (6) If the play is more than 0.030 in. (0.7619 mm), replace the APU Bleed Check-Valve.
5. Close-up________
Subtask 36-12-51-420-053
A. Install the APU Bleed Check-Valve (Ref. TASK 36-12-51-400-001).
Subtask 36-12-51-410-051
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.
Subtask 36-12-51-942-053
C. Put the aircraft back to its initial configuration.
(1) Remove the access platform(s).
(2) Remove the warning notice(s).
APU Bleed Check-Valve
Figure 601/TASK 36-12-51-991-002
1EFF : ALL 1 36-12-51 Page 604
1 1 Feb 01/98
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Subtask 36-12-51-865-054
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1HV, 2HV, 2HA1, 2HA2, 3HA1, 3HA2
VALVE - CROSSBLEED (6HV) - REMOVAL/INSTALLATION
_______________________________________________ TASK 36-12-52-000-001 Removal of the Crossbleed Valve (6HV) WARNING : MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START
_______ WORK ON THE PNEUMATIC SYSTEM.
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking caps
No specific circuit breaker(s) safety clip(s)
No specific warning notices
No specific access platform 2.3 m (7 ft. 7 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
36-12-52-991-001 Fig. 401 3. Job Set-up
__________
Subtask 36-12-52-865-050
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 R 122VU AIR BLEED/X FEED VALVE/NORM 1HV Z20
Subtask 36-12-52-860-050
B. Aircraft Maintenance Configuration
(1) Put the warning notices in position:
-
in the cockpit on the Engine Control Panel 115VU to tell persons not to start the engine(s).
-
in the cockpit on the AIR COND Overhead Control Panel 30VU to tell persons not to push in the APU BLEED pushbutton switch.
- on the HP ground connector to tell persons not to pressurize the pneumatic system.
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