BOMBARDIER SD3-60 Maintenance Manual page 60

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Adjustment/Test
2.
A. Function check
The following operations presume a left windshield being function checked. For right
NOTE:
windshield function check, substitute right for left, and CB248 and CB249 on panel 2D
for CB112 and CB113 on panel 1D.
(1) Check that WINDSHIELDS ON/OFF switches (panel 4P) are selected OFF.
(2) Refer to 12-09-03, pb301.
supply.
(3) Ensure that WINDSHIELD HTG CONTROL and WINDSHIELD HTG HEATER circuit
breakers CB112 and CB113 (panel 1D) are closed.
(4) Check that the WINDSHIELDS - PRESS TO TEST switch/indicators display black.
ONLY THREE CYCLES SHOULD BE PERMITTED TO AVOID DAMAGING THE
CAUTION:
WINDSCREEN.
(5) Select left WINDSHIELDS switch ON and check that:-
(a) heat is transmitted to the left windshield.
(b) left switch/indicator illuminates the NORM (green) caption and
(c) heating cycles on and off with corresponding NORM and black indication.
ONLY THREE CYCLES SHOULD BE PERMITTED TO AVOID DAMAGING THE
CAUTION:
WINDSCREEN.
(6) Depress the left PRESS TO TEST switch/indicator and check that the heat cycles on and
off with corresponding O/HEAT (yellow) indication. Depress and release PRESS TO
TEST switch/indicator.
(7) Check that the heating is off when the switch and/or either circuit breaker is tripped.
B. Thermistor resistance check
(1) Refer to 12-09-03,
(2) Locate the windshield terminal block, circuit ident 1HH9 {left) or 2HH9 (right), on the
windshield between stations 15 and 31 and remove the cables from terminals N1, N2,
O1 and O2.
(3) Using a calibrated ohmmeter, ensure that the resistance across each thermistor is within
the limits given at the corresponding ambient temperature.
EFFECTIVITY: All
SD3-60 AIRCRAFT MAINTENANCE MANUAL
Energise the Main and Shedding DC busbars from a ground
pb301. Render the aircraft electrically safe.
Refer to Table 201.
30-41-00
Page 202
Jan 31/11