Cirrus SR20 - Electrical System Emergencies

Cirrus Design Section 3
SR20 Emergency Procedures
P/N 13999-004 Info Manual 3-23
Electrical System Emergencies
High Voltage on Main Bus 1
M BUS 1 Warning
1. ALT 1 Master Switch ........................................................... CYCLE
2. M Bus 1 Voltage (M1) ........................................................ CHECK
If M Bus 1 Voltage is greater than 32 volts
3. ALT 1 Master Switch ................................................................OFF
4. Perform Alt 1 Caution (Failure) Checklist (do not reset alternator)
Amplification
Main Bus 1 Voltage is excessive, indicates an alternator 1 voltage
regulator failure; will typically be associated with abnormally high
voltage indications on M1, M2 and ESS busses, may also be
associated with M Bus 2 or ESS BUS Warning message.
M BUS 1
September 2011