ABNORMAL
PROCEDURES
AIRPLANE
FLIGHT
4-01 ANAC APPROVED
Page 20 code 01 REVISION 2
IMPAIRED OR CRACKED WINDSHIELD
Turn off the affected windshield heating and close the cockpit door.
If only the outer layer is cracked, continue the flight.
NOTE: There is a windshield heating wire between the middle and
outer layers that can be used as a reference to determine
which layer is cracked. If the wire can be seen without a gap
the crack is in the outer layer, and if there is a wire
discontinuity, the crack may be located on the middle and/or
inner layers.
If the inner or/and middle layer is cracked, limit airspeed to 220 KIAS
maximum and limit altitude to 10000 ft or MEA (whichever is higher).
During descent, select pressurization to manual mode and increase
cabin altitude. While descending, maintain cabin altitude at 10000 ft. At
or below 10000 ft, turn both packs off and check forward visibility. If
only one side is not impaired, the pilot flying must be on the non-
impaired side. If both sides are impaired, limit airspeed to 140 KIAS
maximum and open the direct vision window.
CAUTION:
ACCOMPLISH THE DESCENT IN A MAXIMUM OF 15
MINUTES.
LOSS OF AUXILIARY POWER UNIT
INDICATIONS
If the APU RPM or APU EGT indication on EICAS is displayed in
amber dashes and APU is not essential for the flight, press the APU
emergency stop button, set the APU master selector to OFF and do
not restart the APU.
If the APU RPM or APU EGT indication on EICAS is displayed in
amber dashes and APU is essential for the flight, monitor APU fault
messages. If any APU fault message is displayed on EICAS, press the
APU emergency stop button, set the APU master selector to OFF and
do not restart the APU.
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