Supplies
Table 4 Supplies
Name
Identifications/References
Qty
Reference
Remark
None
Spares
Table 5 Spares
Name
Identifications/References
Qty
Reference
Remark
Splice
Part 971.31.32.636
2
Safety Conditions
None
Procedure
1
General
This data module gives the procedure to check the operation of the windshield de-ice temperature
sensor. It will assist in the troubleshooting of the windshield de-ice system if a CAS WSHLD HEAT
caution message comes on when the windshield de-ice system is set to LIGHT or HEAVY
There are three temperature sensors installed between the laminations of the pilot and copilot
windshield. Only one temperature sensor of each windshield is connected to the windshield de-ice
timer. If the temperature sensor becomes defective one of the other temperature sensors can be used.
This procedure gives the necessary steps to do a check of the windshield de-ice system and if
necessary how to use one of the other temperature sensors. The one remaining temperature sensor
can also be used before it becomes necessary to replace the windshield.
2
Check of the Windshield De-Ice System
2.1
Remove the left or right bottom sidewall panel, refer to AMM 12-B-25-10-03-00A-920A-A.
2.2
De-energize the aircraft electrical system, refer to AMM 12-B-24-00-00-00A-901A-A.
2.3
Disconnect the electrical connector A111P1 from the pilot de-ice controller and A112P1 from the
copilot de-ice controller.
2.4
Use the Multimeter (Pt.No. Local supply) set to resistance, connect the leads to the pilot de-ice
controller electrical connector A111P1 pins 4 and 5. Make sure that the temperature sensor resistance
is:
−
Approximately 315 Ohm at 20 °C (68 °F)
−
Approximately 363 Ohm at 60 °C (140 °F).
2.5
Use the multimeter set to resistance, connect the leads to the copilot de-ice controller electrical
connector A112P1 pins 4 and 5. Make sure that the temperature sensor resistance is:
−
Approximately 315 Ohm at 20 °C (68 °F)
−
Approximately 363 Ohm at 60 °C (140 °F).
2.6
If there is no continuity through the pilot windshield temperature sensor, refer to the related wiring
diagram and:
PC-12/47E AMM Doc No 02300, ISSUE 01 REVISION 26 MSN 545, 1001-1719,
1721-1999
12-B-AM-00-00-00-I
UNCLASSIFIED
Effectivity: All
12-B-30-40-00-00A-901A-A
UNCLASSIFIED
2021-12-04 Page 2