Proper operation of the TAWS can be verified when the aircraft is on
the ground as follows:
1. Select the TAWS page on the MFD
2. Clear all caution messages in the lower right corner
3. Ensure that the TERR INHIBIT switch is not engaged, and
momentarily push the SELF TEST switch:
a. The amber TERR INOP light should be illuminated.
b. The amber TERR INOP light should extinguish.
c. The red TERR WARN light should be illuminated.
d. An aural "EGPWS SYSTEM OK" is enunciated over cockpit
e. The red TERR WARN light should extinguish.
The amber TERR CAUT light should be illuminated.
g. The amber TERR CAUT light should extinguish.
h. A terrain self-test pattern should appear on the MFD.
The terrain self-test should disappear after several sweeps of
the terrain display.
A TAWS Sensor Self Test Caution message should appear in
the lower right comer of the MFD.
4. Acknowledge and clear this caution.
12 of 12
Revision 1: 12-15-07