C. Expendable Parts
 -------------------------------------------------------------------------------
FIG.ITEM |DESIGNATION  |IPC-CSN
 -------------------------------------------------------------------------------
2 packings 21-52-03 27B-020 2 packings 21-52-03 27B-020A 10 packing 21-52-03 27B-055 10 packing 21-52-03 27B-055A
R 14 seal 21-52-03 27B-035 14 seal 21-52-03 27B-035A 14 seal 21-52-03 27B-035B
R 1EFF : ALL 1 21-61-53Page 409 1 1 Aug 01/05 1 1 1CES 1

 D. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
12-33-21-618-001 Pre-conditioning through the HP Ground Connection 12-33-21-618-001 Pre-conditioning with the APU 20-28-00-912-004 Electrical Bonding of Components With Conductive
 Bolts and Screws and Bonding Straps in the Fuselage and in the Wings (this does not include the tanks)-21-61-00-710-001 Operational Test of the Pack Temperature-Control System 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 53-35-13-000-002 Removal of the Quick-Release Access Panels from the Belly Fairing Structure 53-35-13-400-002 Installation of the Quick-Release Access Panels on the Belly Fairing Structure
 **ON A/C 001-049, 051-099, 101-105, 151-158, 201-210,
 21-61-53-991-001 Fig. 401

R **ON A/C 106-149, 159-199, 211-299, 301-399, 401-499,
R 21-61-53-991-001-A Fig. 401A R
 **ON A/C ALL
 3. Job Set-up
__________
 Subtask 21-61-53-860-050
 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).
 (c) FOR 10HH 191KB.
 (d) FOR 30HH 192KB.
 Subtask 21-61-53-865-051
 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 10HH 
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 30HH 
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_________
 **ON A/C 001-049, 051-099, 101-105, 151-158, 201-210,
 (Ref. Fig. 401/TASK 21-61-53-991-001) 
R  **ON A/C 106-149, 159-199, 211-299, 301-399, 401-499, 
R R (Ref. Fig. 401A/TASK 21-61-53-991-001-A) 

R **ON A/C ALL
 Subtask 21-61-53-420-050
 A. Installation of the By-pass Valve
 (1)
 Make sure that the parts retained from the removed component are clean and in the correct condition.

 (2)
 Make sure that the removed seal and packings are in a good condition. If necessary replace the packings (2), the packing (10) and/or the seal (14).
　
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