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21-52-21-200-001  Attachment Components (In-Service Wear Limits) - Air Cycle Machine 10HM1 (11HM1)
 21-52-23-000-001  Removal of the Pipe Assembly between the Main Heat
 Exchanger and the Air Cycle Machine
 21-61-53-000-001  Removal of the Bypass Valve 10HH (30HH)
 24-41-00-861-002  Energize the Aircraft Electrical Circuits from the
 External Power
 53-35-13-000-002  Removal of the Quick-Release Access Panels from the Belly Fairing Structure

R **ON A/C 001-049, 051-099, 101-149, 201-299, 301-399,
 21-52-21-991-001  Fig. 401

 -------------------------------------------------------------------------------
REFERENCE DESIGNATION -------------------------------------------------------------------------------
R  **ON A/C 151-199, 401-499, 
R R 21-52-21-991-001-A  Fig. 401A 
**ON A/C ALL
 21-52-21-991-002 3. Job Set-up__________ Subtask 21-52-21-861-052 Fig. 402
 A. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002). Subtask 21-52-21-865-050
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 10HM1 
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  122VU AIR COND/PACK TEMP CTL SYS2/1/28VDC  4HH  Y19

 

 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION
 -------------------------------------------------------------------------------
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  **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 

 

 **ON A/C ALL
 Subtask 21-52-21-941-050
 C. 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.

 Subtask 21-52-21-010-050
 D. Get Access
 (1)
 Remove the access panel (Ref. TASK 53-35-13-000-002). FOR 10HM1 191KB, FOR 11HM1 192KB.

 (2)
 Remove the pipe assembly (Ref. TASK 21-52-23-000-001).

 (3)
 Remove the bypass valve 10HH (11HH) (Ref. TASK 21-61-53-000-001).

 4. Procedure
_________
 Subtask 21-52-21-020-051

 A. Removal of the Air Cycle Machine R **ON A/C 001-049, 051-099, 101-149, 201-299, 301-399,
 (Ref. Fig. 401/TASK 21-52-21-991-001)

 Air Cycle Machine 10HM1 (11HM1).
 Figure 401/TASK 21-52-21-991-001

R 1EFF : 001-049, 051-099, 101-149, 201-299, 1 21-52-21Page 405 1301-399, 1Aug 01/05 1 1 1CES 1

 

R **ON A/C 151-199, 401-499,

R (Ref. Fig. 401A/TASK 21-52-21-991-001-A) R
 **ON A/C ALL
　
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