3. Job Set-up
__________ Subtask 21-52-42-860-050
 A. Aircraft Maintenance Configuration
 (1)
 Make sure that the aircraft electrical circuits are energized (Ref. TASK 24-41-00-861-002).

 (2)
 On the panel 30VU make sure that:

 (a)
 The APU BLEED pushbutton switch is in the off position (the ON legend is off).

 (b)
 The ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are in the off position (the OFF legends are on).

 (c)
 The warning notice to tell persons not to operate these pushbutton switches is in position.

 (3)
 Make sure that on the HP ground connector the warning notice to tell persons not to supply the ground air is in position.

 (4)
 Make sure that the access panel(s) is/are removed (Ref. TASK 53-35-13-000-002).

 (a)
 FOR 20HM

 -191KB,

 (b)
 FOR 21HM

 -192KB.
 1EFF : ALL 1 21-52-42Page 407 1 1 Feb 01/05R 1 1 1CES 1

 Subtask 21-52-42-865-051
 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 20HM 
R  **ON A/C 401-499,
R  49VU AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399, 52HH  D08 
R  122VU AIR COND/PACK TEMP/CTL SYS1/1/115VAC 122VU AIR COND/PACK TEMP/CTL SYS1/1/28VDC  1HH 3HH  X22X21 
R  **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-302, 
R R  122VU AIR COND/PACK TEMP CTL SYS2/1/28VDC **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,  4HH  Y19 
R R  122VU AIR COND/PACK TEMP CTL SYS2/1/115VAC **ON A/C 106-149, 303-399,  2HH  Y18 
R  122VU  4HH  Y19 
R  **ON A/C 401-499, 
R R  122VU AIR COND/TEMP CTL SYS 1/CHAN A/115VAC 122VU AIR COND/TEMP CTL SYS 1/CHAN A/28VDC 122VU AIR COND/TEMP CTL SYS 1/CHAN B/115VAC  49HH 51HH 50HH  X22 X21Y18

 -------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------**ON A/C ALL
 FOR 21HM 
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 122VU AIR COND/PACK TEMP/CTL SYS1/2/115VAC 122VU AIR COND/PACK TEMP/CTL SYS1/2/28VDC 122VU AIR COND/PACK TEMP CTL SYS2/2/28VDC 122VU AIR COND/PACK TEMP CTL SYS2/2/115VAC  21HH 23HH 24HH 22HH  W22W21Y21Y20 
R  **ON A/C 401-499,
R R  122VU AIR COND/TEMP CTL SYS 2/CHAN A/115VAC 122VU AIR COND/TEMP CTL SYS 2/CHAN A/28VDC 122VU AIR COND/TEMP CTL SYS 2/CHAN B/28VDC 122VU AIR COND/TEMP CTL SYS 2/CHAN B/115VAC  53HH 55HH 56HH 54HH  W22W21 Y21Y20 
**ON A/C ALL
 4. Procedure_________
 (Ref. Fig. 401/TASK 21-52-42-991-001)
 Subtask 21-52-42-420-050
 A. Installation of the Water Injector
 (1) Clean the component interface and/or the adjacent area.
 (2) Put the washer (6) and the water injector (2) in position on the inlet plenum (1).
 (3) Make sure that the water injector is in the correct position and install the washers (5) and the bolts (4).
 NOTE : The water injector nozzle must point in the direction of the____ airflow.

 (4)
 Remove the blanking plugs from the disconnected line ends.

 (5)
 Connect the water hose (3) to the water injector (2).

 (6)
 TORQUE the water hose (3) connector to between 1.65 and 1.75 m.daN

 (12.16 and 12.90 lbf.ft).

 (7)
 Make sure that the work area is clean and clear of tool(s) and other items.

 5. Close-up
________

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 Subtask 21-52-42-865-052
 A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): FOR 20HM 1HH, 2HH, 3HH, 4HH. FOR 21HM 21HH, 22HH, 23HH, 24HH.

R **ON A/C 401-499,
 Subtask 21-52-42-865-052-A
 A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): FOR 20HM 49HH, 50HH, 51HH, 52HH. FOR 21HM 53HH, 54HH, 55HH, 56HH.
 **ON A/C ALL
 Subtask 21-52-42-410-051
 B. Close Access
 (1) Install the access panel/s (Ref. TASK 53-35-13-400-002).
　
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