(4)
Close the FWD cargo-compartment door 825 (Ref. TASK 52-30-00-860-002).
Subtask 21-63-15-862-050
B. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
SENSOR - MIXER UNIT TEMPERATURE (24HK,25HK) - REMOVAL/INSTALLATION
__________________________________________________________________
TASK 21-63-16-000-001
Removal of the Mixer Temperature Sensor 24HK (25HK)
WARNING : MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM
_______
FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE.
HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.
NOTE : The procedure is the same for mixer temperature sensors 24HK (25HK).
____
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific blanking caps
No specific blanking plugs
No specific circuit breaker(s) safety clip(s)
No specific access platform 2 m (6 ft. 7 in.)
B. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
External Power
25-54-12-000-001 Removal of the FWD Cargo Compartment Partition FR34
52-30-00-860-001 Open the FWD or AFT Cargo-Compartment Door with the
Yellow Electric Pump
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-302,
21-63-16-991-001 Fig. 401
-------------------------------------------------------------------------------
REFERENCE DESIGNATION -------------------------------------------------------------------------------
R **ON A/C 106-149, 303-399, 401-499,
21-63-16-991-001-A Fig. 401A
**ON A/C ALL
3. Job Set-up__________
Subtask 21-63-16-861-050
A. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
Subtask 21-63-16-865-050
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
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,
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,
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 1/CHAN A/115VAC 122VU AIR COND/TEMP CTL SYS 1/CHAN A/28VDC 122VU AIR COND/TEMP CTL SYS 2/CHAN B/28VDC 53HH 55HH 49HH 51HH 56HH W22W21X22X21 Y21
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
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 ALL
Subtask 21-63-16-010-050
C. Get Access
(1)
Open the FWD cargo compartment door 825 (Ref. TASK 52-30-00-860-001).
(2)
Put the access platform in position at the FWD cargo compartment door
825.
(3)
Remove the access panel 131NW, (Ref. TASK 25-54-12-000-001).
4. Procedure
_________
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-302,
(Ref. Fig. 401/TASK 21-63-16-991-001) R **ON A/C 106-149, 303-399, 401-499,
(Ref. Fig. 401A/TASK 21-63-16-991-001-A)
**ON A/C ALL
Subtask 21-63-16-020-050
A. Removal of the Temperature Sensor
(1)
Disconnect the electrical connector (2).
(2)
Put blanking caps on the disconnected electrical connectors.
(3)
Remove and discard the lockwire.
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