_______ THE AVIONICS VENTILATION SYSTEM IS NOT SERVICEABLE. IF YOU ENERGIZE THE AIRCRAFT ELECTRICAL CIRCUITS WITHOUT THE VENTILATION SYSTEM YOU WILL CAUSE DAMAGE TO ELECTRICAL EQUIPMENT.
Subtask 21-26-13-861-050
A. Energize the ground service network
(Ref. TASK 24-42-00-861-001).
Subtask 21-26-13-865-050
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU AIR COND/AVNCS VENT/CTL 6HQ D06 49VU AIR COND/AVNCS VENT/CTL 5HQ D05 122VU AIR COND/AVNCS/VENT/MONG 3HQ Y17
Subtask 21-26-13-010-050
C. Get Access
(1)
Put the access platform in position at the access door 822.
(2)
Open the access door 822.
4. Procedure
_________ (Ref. Fig. 401/TASK 21-26-13-991-001) Subtask 21-26-13-020-051
A. Removal of the Skin Temperature Sensor
(1)
Disconnect the electrical connector (2).
(2)
Put blanking caps on the disconnected electrical connectors.
(3)
Remove the screws (5) and the washers (4).
(4)
Remove the cover (3).
(5)
Cut and remove the lockwire from the sensor (1).
(6)
Remove the sensor (1).
Skin Temperature Sensor
Figure 401/TASK 21-26-13-991-001
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TASK 21-26-13-400-001
Installation of the Avionics Ventilation Skin Temperature Sensor (28HQ)
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific lockwire 0.032 in. (0.8 mm) dia
No specific access platform 1.60 m (5 ft. 3 in.)
R No specific Torque Wrench : range 0.00 to 1.20 m.daN
R (0.00 to 9.00 lbf.ft)
B. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
R 21-26-00-710-001 Operational Check of System via MCDU 21-26-13-710-001 Operational Test of the Skin Temperature Sensor (28HQ) (without the CFDS) 24-42-00-861-001 Energize the Ground Service Network from the External Power 24-42-00-862-001 De-energize the Ground Service Network Supplied from the External Power 21-26-13-991-001 Fig. 401
3. Job Set-up
__________
Subtask 21-26-13-860-050
A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized (Ref. TASK 24-42-00-861-001).
Subtask 21-26-13-865-051
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU AIR COND/AVNCS VENT/CTL 6HQ D06 49VU AIR COND/AVNCS VENT/CTL 5HQ D05 122VU AIR COND/AVNCS/VENT/MONG 3HQ Y17
Subtask 21-26-13-010-052
C. Get Access
(1)
Make sure that the access platform is in position at the access door
822.
(2)
Make sure that the access door 822 is open.
4. Procedure
_________
(Ref. Fig. 401/TASK 21-26-13-991-001)
Subtask 21-26-13-420-051
A. Installation of the Skin Temperature Sensor R (1) Install the sensor (1) and TORQUE to 0.3 m.daN (26.54 lbf.in). R NOTE : Make sure that there is a good contact between the sensor and
____ R its support.
(2)
Safety the sensor with lockwire 0.032 in. (0.8 mm) dia.
(3)
Put the cover (3) in position.
(4)
Install the washers (4) and the screws (5) and tighten the screws.
(5)
Remove the blanking caps from the electrical connectors.
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