TBM
700
850
SUPPLEMENT 49
”GARMIN”
G1000 TAWS
SYSTEM
Page 9.49.10
Rev. 1
PREMATURE DESCENT ALERTING
A Premature Descent Alert (PDA) is issued when the system detects that the
airplane is significantly below the normal approach path to a runway (Figure
9.49.1).
PDA alerting begins when the airplane is within 15 Nm of the destination
airport. PDA alerting ends when the airplane is either :
. 0.5 Nm from the runway threshold
OR
. at an altitude of 125 feet AGL while within 1.0 Nm of the threshold.
Figure 9.49.1 -- PDA alerting threshold
The aural/displayed messages associated with the PDA function are
described in the table 7.3.
Alert Type
PFD/MFD
TAWS Page
Annuncia--
tion
MFD Map Page
Pop--Up Alert
Aural Message
Premature Descent
Alert Caution (PDA)
(Amber)
TERRAIN
TOO LOW -- TERRAIN
“Too low, Terrain”
Table 7.3 -- PDA alerts
