R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 21-52-41-991-002  Fig. 402
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION ------------------------------------------------------------------------------- 
R  **ON A/C 401-499,  
R  21-52-41-991-002-B Fig. 402A **ON A/C 001-049, 051-099, 101-105, 151-158, 201-210, 
R  21-52-41-991-003 Fig. 403 **ON A/C 106-149, 159-199, 211-299, 301-399,  
R R  21-52-41-991-003-A **ON A/C 401-499,  Fig. 403A  
R  21-52-41-991-003-C **ON A/C ALL Fig. 403B 
R  21-52-41-991-004 Fig. 404 **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399, 
R  21-52-41-991-005 **ON A/C 401-499, Fig. 405  
21-52-41-991-005-A **ON A/C ALL Fig. 405A 
 21-52-41-991-006  Fig. 406
 3. Job Set-up__________ Subtask 21-52-41-861-051 
 A. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002). Subtask 21-52-41-865-050 
 B. Open, safety and tag this(these) circuit breaker(s): 
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 10HM  
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399, 
R  49VU AIR COND/FLOW/CTL &/IND1 **ON A/C 401-499, 1HB  D07  
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
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION
 -------------------------------------------------------------------------------
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 
 **ON A/C ALL 
 FOR 11HM  
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399, 
 122VU AIR COND/FLOW/CTL AND IND/2 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  2HB 21HH 23HH 24HH 22HH  V21W22W21Y21Y20  
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 
 Subtask 21-52-41-010-050-A 
 C. Get Access 
 (Ref. Fig. 401/TASK 21-52-41-991-001-A) 
 (1) Remove the access panel/s (Ref. TASK 53-35-13-000-002). 
 (a) FOR 10HM - 191BB - 191KB,
 Access Panel Location Figure 401/TASK 21-52-41-991-001-A  
R 1EFF : 1 1 1CES  ALL  1 111 21-52-41 Page 405 Feb 01/05
 (b) FOR 11HM - 192FB - 192KB. 
 Subtask 21-52-41-941-050 
 D. 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 pushbutton switches. 
 (2) On the HP ground connector put a warning notice in position to tell persons not to supply the ground air. 
 4. Procedure_________  
R 
 Subtask 21-52-41-020-050 
 A. Removal of the Cross Beam and the Duct Connectors  
 
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