GPWS PANEL-even

Question 1

What does pressing the GPWS SYS pushbutton do?

Answer 1

All basic GPWS alerts (mode 1 to 5) are inhibited.

Question 2

What does an amber FAULT light in the SYS pushbutton indicate on the GPWS panel?

Answer 2

Any failure of GPWS mode 1 through 5

Question 3

What effect, if any, does an amber FAULT light in the SYS pushbutton have on the TERR mode?

Answer 3

No effect at all

Question 4

Describe a situation when a pilot might press LDG FLAP 3.

Answer 4

• When directed to by the ECAM or procedure
• To avoid nuisance warning in case of landing in CONF 3.

* In this case, LDG MEMO displays FLAPS…CONF 3 instead of CONF FULL

Question 5

Describe a situation when a pilot might press the FLAP MODE pushbutton.

Answer 5

When directed by the ECAM or procedure to avoid nuisance warning in
case of landing with flaps setting reduced.

Question 6

What effect, if any, does the failure of TERR mode have on basic GPWS?

Answer 6

No effect whatsoever

Question 7

According to our limitations, in what conditions should predictive GPWS be
inhibited?

Answer 7

The predictive GPWS functions should be inhibited (TERR pushbutton to
OFF, on the GPWS panel) when the aircraft position is less than 15 NM
from the airfield:
o For operations from/to runways not incorporated in the predictive
GPWS database.
o For specific approach or departure procedures, which have
previously been identified by the operator as potentially causing
expected or spurious terrain alerts.
Note: The decision to inhibit the predictive GPWS functions must not be based on
flight crew judgement only.

Question 8

According to our FOM, what are some conditions when GPWS may be
inhibited?

Answer 8

The Ground Proximity Warning System (GPWS) may be inhibited or
deactivated if any of the following conditions occur:
o A warning occurs during daylight VMC conditions and it is obvious
that the aircraft position, altitude and gear/flap configuration are
satisfactory. (Note: Proximity to a strong temperature inversion may
cause the radio altimeter to show height above differing air densities.)
o The GPWS fault monitor light illuminates and the fault cannot be
corrected. (Note: Flagging radio altimeter may cause the light to
illuminate. Do not inhibit GPWS if the radio altimeter flagging is
above 2500’ AGL)
o When a planned abnormal condition requires aircraft operation within
the boundaries of the GPWS warning envelope (i.e., abnormal gear
or flap landing configurations).
o On a front course ILS, the inhibit function should only be used when
flight below the glideslope is intentional (e.g., when following the
glideslope to touchdown precludes landing at the normal touchdown
point). Never cancel an actual glideslope warning until clear of all
clouds and the runway is clearly in sight.