(2)
 Install the access panel 162CW (Ref. TASK 25-55-12-400-003).

 (3)
 Remove the access platform(s).

 (4)
 Remove the warning notice(s).

 (5)
 Close the AFT cargo-compartment door 826 (Ref. TASK 52-30-00-860-002).

 Subtask 21-31-51-862-051
 B. De-energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-862-002).

R 1EFF : ALL 1 21-31-51Page 435 1 1 May 01/05 1 1 1CES 1R **ON A/C 001-049, 051-099, 101-105,

 TASK 21-31-51-000-006
 Removal of the Outflow Valve 10HL (From Outside)
 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.

 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 600 ohm boomset
 No specific 600 ohm headset
 No specific access platform 1.0 m (3 ft. 3 in.)
 No specific access platform 2.0 m (6 ft. 7 in.)
 No specific access platform 3.4 m (11 ft. 2 in.)

 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
23-44-00-700-001 Operational Test of the Service Interphone 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power
R **ON A/C 001-049, 051-061, 101-105,
 21-31-51-991-004 Fig. 402
R 1EFF : 001-049, 051-099, 101-105, 1 21-31-51Page 436 1 1 May 01/05 1 1 1CES 1

 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------

R **ON A/C 062-099,
R 21-31-51-991-004-A Fig. 402A
R **ON A/C 001-049, 051-099, 101-105,
 3. Job Set-up
__________
 Subtask 21-31-51-861-050
 A. Energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-861-002).

 Subtask 21-31-51-865-065
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU AIR COND/CAB/PRESS/CTL1 1HL D09 122VU AIR COND/AFT CARGO VENT/FAN 30HN S22 122VU AIR COND/LAV/GALLEY VENT CTL/EXTRACT FAN/SPLY 6HU U19 122VU AIR COND/CAB PRESS/CTL/MAN 3HL Y23 122VU AIR COND/CAB PRESS/CTL/2 2HL Y22
R 1EFF : 001-049, 051-099, 101-105, 1 21-31-51Page 437 1 1 May 01/05 1 1 1CES 1

R  **ON A/C 001-049, 051-061, 101-102,
 Subtask 21-31-51-010-062
 C. Get Access
 (1) Put the access platform in position at the avionics access door 824 in Zone 126.
 WARNING : OPEN THE ACCESS DOOR AND MAKE SURE IT STAYS OPEN._______ ATTACH A WARNING NOTICE TO THE ACCESS DOOR TO TELL PERSONS NOT TO CLOSE IT. THIS IS TO PREVENT ACCIDENTAL PRESSURIZATION OF THE AIRCRAFT BY THE AIR CONDITIONING SYSTEM IF ALL THE OTHER CABIN OPENINGS ARE CLOSED. PRESSURIZATION OF THE AIRCRAFT CAN BE DANGEROUS. IT CAN CAUSE A DOOR TO OPEN WITH EXPLOSIVE FORCE WHICH CAN CAUSE INJURY AND/OR DAMAGE.
 (2) Open the avionics access door 824.
 (3) Put the access platform in position below the outflow valve, in zone 172.
 (4) Put the access platform in position at the access panel 312AR.
 (5) Remove the access panel 312AR. 
R  **ON A/C 001-049, 051-099, 101-105,
 Subtask 21-31-51-869-050
 D. Energize the service interphone system (Ref. TASK 23-44-00-700-001).
 4. Procedure_________ 
R  **ON A/C 001-049, 051-061, 101-105,
 (Ref. Fig. 402/TASK 21-31-51-991-004) 
R  **ON A/C 062-099, 
R  (Ref. Fig. 402A/TASK 21-31-51-991-004-A) 

R 1EFF : 001-049, 051-099, 101-105, 1 21-31-51Page 438 1 1 May 01/05 1 1 1CES 1R **ON A/C 001-049, 051-099, 101-105,

 Subtask 21-31-51-020-061
 A. Preparation for Removal of the Outflow Valve NOTE : This procedure is only applicable for outflow valves P/N
____ 9023-15703-81 and previous. The outflow valve must be in the open position for this part of the procedure.
　
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