C
IRRUS
D
ESIGN
S
ECTION
3A: A
BNORMAL
P
ROCEDURES
SR20
E
LECTRICAL
S
YSTEM
P/N 11934-005
3A-11
FUEL IMBALANCE Advisory
Electrical System
M BUS 1 Caution
FUEL IMBALANCE
Fuel Imbalance
1. Fuel Quantity Gauges....................................................................... CHECK
2. Fuel Pump.................................................................................................. ON
If Fuel Pump is already ON for vapor suppression, pump should be left
in this position for tank switch.
3. Fuel Selector......................................................... SELECT FULLER TANK
4. Fuel Pump............................................................................. AS REQUIRED
After switching tanks, message will remain until sensed imbalance is less
than 5.5 gallons.
Procedure Complete
• N
OTE
•
Fuel level imbalance (between left and right) is greater than 5.5
gallons.
M BUS 1
Low Voltage on Main Bus 1
1. Perform
Procedure Complete
• N
OTE
•
Main Bus 1 Voltage is low, indicates Alt 1 failure and will typically
be associated with low M1 voltage Alt 1 current indications,
Battery 1 discharge and
message.
Reissue A