3. Job Set-up
__________
CAUTION : USE ONLY THE GROUND SERVICE NETWORK TO SUPPLY ELECTRICITY BECAUSE
_______ 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 21-26-12-860-050
A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized (Ref. TASK 24-42-00-861-001).
Subtask 21-26-12-010-051
B. Get Access
(1) Make sure that the access platform is in position at the access door
824.
(2) Make sure that the access door 824 is open.
Subtask 21-26-12-865-051
C. 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
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
123VU AVNCS VENT/EXTC/FAN 2HQ AE02 **ON A/C ALL
123VU AVNCS VENT/BLOWER/FAN 1HQ AD10
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
R **ON A/C 301-399,
R 123VU AVNCS VENT/EXTC/FAN 2HQ AC04 R **ON A/C ALL
4. Procedure
_________
(Ref. Fig. 401/TASK 21-26-12-991-001)
Subtask 21-26-12-420-050
A. Installation of the Duct Temperature Sensor
(1)
Put the new O-ring (3) in the groove of the sensor (2).
(2)
Install the sensor (2) and tighten it.
(3)
Safety the sensor with lockwire 0.020 in. (0.51 mm) dia.
(4)
Remove the blanking caps from the electrical connectors.
(5)
Make sure that the electrical connectors are clean and in the correct condition.
(6) Connect the electrical connector (1).
Subtask 21-26-12-865-052
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1HQ, 2HQ, 3HQ, 5HQ, 6HQ
Subtask 21-26-12-710-050
C. Do an operational test of the avionics equipment ventilation (Ref. TASK 21-26-00-710-001).
5. Close-up
________ Subtask 21-26-12-410-050
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Close the access door 824 (Ref. TASK 52-41-00-410-002).
(3) Remove the access platform(s). Subtask 21-26-12-862-051
B. De-energize the ground service network
(Ref. TASK 24-42-00-862-001).
SENSOR - SKIN TEMPERATURE (28HQ) - REMOVAL/INSTALLATION
_______________________________________________________ TASK 21-26-13-000-001 Removal 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 blanking caps
No specific circuit breaker(s) safety clip(s)
No specific access platform 1.60 m (5 ft. 3 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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