(1) Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).

 Temperature Sensors 21HK (22HK,23HK).
 Figure 401/TASK 21-63-17-991-001

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 Temperature Sensors 21HK (22HK,23HK).
 Figure 401A/TASK 21-63-17-991-001-A12 (SHEET 1)

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 Temperature Sensors 21HK (22HK,23HK).
 Figure 401A/TASK 21-63-17-991-001-A22 (SHEET 2)

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 Temperature Sensors 21HK (22HK,23HK).
 Figure 401B/TASK 21-63-17-991-001-B12 (SHEET 1)

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 Temperature Sensors 21HK (22HK,23HK).
 Figure 401B/TASK 21-63-17-991-001-B22 (SHEET 2)

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 **ON A/C 001-003, 051-052,
 Subtask 21-63-17-865-050
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------122VU AIR COND/ZONE TEMP CTL/28VDC/SYS2 4HK V20 122VU AIR COND/ZONE TEMP CTL/28VDC/SYS1 3HK V19 122VU AIR COND/ZONE TEMP CTL/115VAC/SYS2 2HK V18 122VU AIR COND/ZONE TEMP CTL/115VAC/SYS1 1HK V17 
R  **ON A/C 004-049, 053-099, 101-149, 151-199, 201-299, 301-399, 401-499,
 Subtask 21-63-17-865-053
 C. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 22HK, 23HK 
R  **ON A/C 401-499,
 49VU AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC  52HH  D08 
R  **ON A/C 004-049, 053-099, 101-149, 151-199, 201-299, 301-399,
 122VU AIR COND/ZONE TEMP CTL/28VDC/SYS2 122VU AIR COND/ZONE TEMP CTL/28VDC/SYS1 122VU AIR COND/ZONE TEMP CTL/115VAC/SYS2 122VU AIR COND/ZONE TEMP CTL/115VAC/SYS1  4HK 3HK 2HK 1HK  V20V19V18V17 
R  **ON A/C 401-499,
 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 1/CHAN A/115VAC 122VU AIR COND/TEMP CTL SYS 1/CHAN A/28VDC  53HH 55HH 49HH 51HH  W22W21X22X21

 -------------------------------------------------------------------------------
PANEL DESIGNATION  IDENT. LOCATION
 -------------------------------------------------------------------------------
R  122VU AIR COND/TEMP CTL SYS 2/CHAN B/28VDC 56HH Y21 122VU AIR COND/TEMP CTL SYS 2/CHAN B/115VAC 54HH Y20 122VU AIR COND/TEMP CTL SYS 1/CHAN B/115VAC 50HH Y18
R
 **ON A/C 001-003, 051-052,
 Subtask 21-63-17-010-050
 D. Get Access
 (1)
 For the Cockpit Temperature Sensor
 FOR 21HK

 (a) Remove the grill (12) from the cockpit ceiling.

 (2)
 For the Cabin Temperature Sensors
 FOR 22HK, 23HK

 (a) Remove the cabin ceiling panel (Ref. TASK 25-23-41-000-001).
 FOR 22HK
 231DC,
 FOR 23HK

 251CC.
 **ON A/C 004-049, 053-099, 101-149, 201-299, 301-399,

 Subtask 21-63-17-010-050-A
 D. Get Access
 (1) For the Cockpit Temperature Sensor WARNING : MAKE SURE THAT NO AC OR DC POWER IS CONNECTED TO THE
_______ AIRCRAFT ELECTRICAL CIRCUITS. THERE IS A RISK OF ELECTROCUTION IF THE AC OR DC POWER STAYS CONNECTED.
R 1EFF : 001-049, 051-099, 101-149, 201-299, 1 21-63-17Page 409 1301-399, 401-499, 1Aug 01/05 1 1 1CES 1 FOR 21HK

 (a)
 Remove the screws (4) and the grill (5).

 (b)
 Open the circuit breaker panel (1) 123VU.

 (2) For the Cabin Temperature Sensors
 FOR 22HK, 23HK

 (a) Remove the cabin ceiling panels (Ref. TASK 25-23-41-000-001),
 FOR 22HK
 231DC.
 FOR 23HK

 251CC. R **ON A/C 151-199, 401-499,
 Subtask 21-63-17-010-050-B
 D. Get Access
 (1) For the Cockpit Temperature Sensor WARNING : MAKE SURE THAT NO AC OR DC POWER IS CONNECTED TO THE
_______ AIRCRAFT ELECTRICAL CIRCUITS. THERE IS A RISK OF ELECTROCUTION IF THE AC OR DC POWER STAYS CONNECTED.
 FOR 21HK
 (a)
 Remove the screws (4) and the grill (5).

 (b)
　
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