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R  **ON A/C 401-499,
 C. Heat Exchanger Cooling Mode One air conditioning pack can also be operated on heat exchanger cooling only provided: - one of the two lanes of the applicable ACSC is operative - the TAT indication is available, - the affected pack is not operated until the aircraft is airborne, - the TAT is less than 12 Deg C and the pack outlet temperature indication is available.
 **ON A/C ALL
 6. BITE Test_________ 
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 The pack controllers 7HH (27HH) control the BITE function for the air conditioning packs (Ref 21-61-00). 
R  **ON A/C 401-499,
 The ACSC's 47HH (57HH) control the BITE function for the air conditioning packs (Ref 21-61-00).

 

 AIR COOLING SYSTEM - SERVICING
______________________________
 TASK 21-52-00-960-001
 Replacement of the Water Injector Nozzle
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------
REFERENCE  QTY DESIGNATION
 -------------------------------------------------------------------------------
No specific  circuit breaker(s) safety clip(s)
R No specific  Torque Wrench : range 0.00 to 1.20 m.daN
R  (0.00 to 9.00 lbf.ft)
 B. Consumable Materials
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
Material No. 08-063  USA MIL-T-27730 SIZE 2
 TAPE,ANTISEIZE, POLYTETRAFLUORO- ETHYLENE
 (Ref. 20-31-00)

 C. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
21-52-42-000-001 Removal of the Water Injector 20HM (21HM) 21-52-42-400-001 Installation of the Water Injector 20HM (21HM) 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 21-52-00-991-019 Fig. 301

 3. Job Set-up__________ Subtask 21-52-00-861-062
 A. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002). Subtask 21-52-00-865-075
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------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  49HH 51HH  X22 X21

 

 -------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------122VU AIR COND/TEMP CTL SYS 1/CHAN B/115VAC 50HH Y18
 **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
 Subtask 21-52-00-010-071
 C. Get Access
 (1) Remove the water injector (Ref. TASK 21-52-42-000-001).
 4. Procedure_________
　
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