Pilot's Operating Handbook
Section 7
Description
Edition 0 - October 31, 2013
Rev. 4
Page 7.3.4
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gear up, idle and stall
alternate high-pitched and
low-pitched sounds
-
gear up, extended flaps and stall
alternate high-pitched and
low-pitched sounds
The aural warning box is fixed under cabin floor, on L.H. side, between frames C5 and
C6.
It is electrically supplied by ESS BUS 2 bar and protected by AURAL WARN circuit
breaker.
Cockpit overhead panel
- see figure 7.3.2
This panel includes following elements :
-
the loud-speaker of GMA 1,
-
the loud-speaker of GMA 2,
-
the VMO alarm buzzer,
-
the HORN TEST knob,
-
the emergency lighting rheostat.
It is attached to the cabin upper part between frames C6 and C7.
The VMO alarm buzzer is electrically supplied by ESS BUS 2 bar and protected by
AURAL WARN circuit breaker and the emergency lighting rheostat is electrically
supplied by BATT BUS bar and protected by PANEL EMER circuit breaker.
Aural warning operation
The GMA 1 and GMA 2 audio control panels receive signals from the aural warning
box. According to the airplane configuration, these signals are low-pitched and / or
high-pitched.
The HORN TEST knob allows to test the correct operation of aural warnings :
-
Set the SOURCE selector to BATT or to GPU.
-
Push and hold the HORN TEST knob :
.
the VMO buzzer emits bips,
.
the loud-speakers emit alternate low-pitched and high-pitched sounds.
-
Release the knob to stop the alarms.
PIM - DO NOT USE FOR FLIGHT OPERATIONS
