-------------------------------------------------------------------------------
REFERENCE DESIGNATION -------------------------------------------------------------------------------
R **ON A/C 001-049, 051-099, 101-149, 201-299, 301-399,
 21-52-21-991-001 Fig. 401 R **ON A/C 151-199, 401-499,
R 21-52-21-991-001-A R
 **ON A/C ALL
 21-52-21-991-002 
3. Job Set-up
__________
 Subtask 21-52-21-860-050
Fig. 401A 
Fig. 402
 A. Aircraft Maintenance Configuration
 (1) Make sure that:
 (a)
 The aircraft electrical circuits are energized (Ref. TASK 24-41-00-861-002).
 (b)
 The access panel is removed (Ref. TASK 53-35-13-000-002), FOR 10HM1 191KB, FOR 11HM1 192KB.
 (c)
 The pipe assembly is removed (Ref. TASK 21-52-23-000-001).
 (d)
 The bypass valve 10HH (30HH) is removed (Ref. TASK 21-61-53-000-001).
 (e)
 On the panel 30VU: 1 The APU BLEED pushbutton switch is in the off position (the ON
_
 legend is off).
 2_ The ENG 1 BLEED and the ENG 2 BLEEDpushbutton switches are in the off position (the OFF legends are on). 
 3_ The warning notice to tell persons not to operate these pushbutton switches is in position. 
 4_ On the HP ground connector the warning notice to tell persons not to supply ground air is in position. 
 Subtask 21-52-21-865-051 
 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged 
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 10HM1  
R  **ON A/C 401-499, 
 49VU AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC  52HH  D08  
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399, 
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  122VU AIR COND/PACK TEMP CTL SYS2/1/28VDC  4HH  Y19  
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,  
R  122VU AIR COND/PACK TEMP CTL SYS2/1/115VAC  2HH  Y18  
R  **ON A/C 106-149, 303-399,  
R  122VU  4HH  Y19
R  -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------**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 
 **ON A/C ALL 
 FOR 11HM1  
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  
 
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