AIRPLANE
OPERATIONS
MANUAL
FLIGHT
INSTRUMENTS
REVISION 37
2-17-20
Page
1
Code
01
AOM-145/1114
STANDBY INSTRUMENTS
Standby instruments are provided to supply flight data information in
case of PFD and MFD loss.
The standby instruments comprise the following functions: pitch and
roll attitudes, airspeed, altitude and magnetic heading.
Such instruments are conventional units and most of them are
available even in case of total loss of electrical power.
Optionally, the conventional units may be replaced by a single display,
the Integrated Standby Instruments System (ISIS). However, as the
magnetic heading displayed by this equipment is received from the
AHRS 1 or IRS 1, the conventional Magnetic Compass is provided as
a back-up unit.
The pilot is responsible for checking the standby instruments
indications against PFD indications, in order to ensure that the back-
up units will present reliable indication in an emergency situation.
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