CREW
AWARENESS
AIRPLANE
OPERATIONS
MANUAL
2-04-10
Page
4
Code
01
REVISION 30
INHIBITION LOGIC
To avoid its nuisance effect upon the flight crew, inhibition logic is
provided to prevent some messages from being displayed during
takeoff and approach/landing phases. The inhibition logic is as follows:
Takeoff Phase:
Inhibition is valid when the airplane crosses V
1
–15 kt. The inhibition is
deactivated when one of the following conditions is accomplished:
− radio altitude is greater than 400 ft or;
− calibrated airspeed is less than 60 kt or;
− after 1 minute.
Approach/landing Phase:
Inhibition is valid from the point when airplane crosses 200 ft radio
altitude. The inhibition is deactivated when one of the following
conditions is accomplished:
− airplane is on the ground for 3 seconds or more;
− after 1 minute.
IC-600 RESULTS SELF-CHECK
The results of both IC-600 computations are continuously compared to
check for any inconsistency between both sides. A dedicated amber
annunciation, “CAS MSG”, is provided on the PFDs to indicate
whenever a difference between both IC-600s has been found, thus
leading to possible unreliable messages.
EICAS MESSAGE DICTIONARY
The following table presents all the EICAS messages. Type column
indicates whether the message’s nature is Warning (W), Caution (C),
or Advisory (A).
The number in column INHIBITION indicates the following:
− (1) Message is inhibited during takeoff;
− (2) Message is inhibited during takeoff and approach/landing;
− (3) Message is not inhibited;
− (4) Message is inhibited during approach/landing;
− (5) Message is inhibited on the ground and on all flight phases
excluding takeoff.
For further information regarding each message’s logic, refer to the
associated system’s description.
To Next Page
