Ice Protection, Pneumatics, Ventilation

Question 1

PITOTS, PROBES AND STATIC PORTS ARE (heated & monitored):

Answer 1

• Heated on ground and in flight (if PB pressed)
• Monitored by CCAS on ground and in flight, except static ports are monitored by CCAS on ground only.

Question 2

AIRCRAFT IN FLIGHT, IF THE “AAS” SYSTEM DETECTS ICE WHILE ICING “AOA” GREEN LIGHT IS EXTINGUISHED:

Answer 2

The amber ICING light illuminates flashing, MASTER CAUTION and single chime.

Question 3

MODE SEL AUTO IN “MAN” ON THE DE ICING PANEL, WHEN SHOULD THE “MODE SEL PB” BE “ON”?

Answer 3

If SAT below -20 C; causes a cycle length of 180 sec

• MODE SEL pb*
• To be used when SAT < -20 °C. Controls the selection of wings/engines boots inflation cycles when MAN is selected on MODE SEL AUTO pb.*
• FAST (Pb released) Timing cycle = 60 s.
• SLOW (Pb pressed in) timing cycle = 180 s - SLOW light comes on blue.

Not to be confused with prop anti-icing button logic!

Question 4

PROBES HEATING AND WINDSHIELD HEATING PB “ON” IN HOTEL MODE OPERATION:

Answer 4

Static ports and STBY pitot are heated

Question 5

“EXHAUST MODE” FAULT PB IS ILLUMINATED IN CASE OF:

Answer 5

Fan failure or over temperature and CCAS is activated