Engine Indicating System Failure; Low Volts Warning Light Illuminated; Revision A5 - Cirrus SR22 Pilot Operating Handbook

Cirrus Design Section 3A
SR22 Abnormal Procedures
2. Alternator 2 Circuit Breaker ........................... CHECK and RESET
3. ALT 2 Master Switch ..................................................................ON
If alternator does not reset:
4. Switch off unnecessary equipment on Main Bus 1, Main Bus 2,
and Non-Essential Buses to reduce loads.
5. ALT 2 Master Switch ................................................................ OFF
6. Land as soon as practical.

Engine Indicating System Failure

Serials 1644, 1663 and Subsequent: In the event of an Data
Acquisition Unit (DAU) failure, the engine indications displayed on the
MFD and PFD will be disabled. Numeric readouts will display as three
white dashes, the CHT and EGT bar graphs will be removed, and
indicator needles displayed on the simulated gages will be removed.
In the event of DAU failure, pull and reset the ANNUN / ENGINE INST
circuit breaker. If the engine indicating system fails to reset, land as
soon as practical.
1. ANNUN / ENGINE INST Circuit Breaker ............................... Cycle
2. Land as soon as practical.

LOW VOLTS Warning Light Illuminated

Illumination of the LOW VOLTS light indicates that the voltage
measured at the Essential Bus is 24.5 volts or less. Typically, this
indicates that the airplane is operating on battery power only and both
alternators have failed or are off. If both alternators have failed:
1. Land as soon as practical.
P/N 13772-001 3A-11

Revision A5