3A-10
P/N 11934-003
Section 3A
Cirrus Design
Abnormal Procedures
SR20
ALT 1 Light Steady
Steady illumination indicates a failure of ALT 1. Attempt to bring
alternator back on line. If alternator cannot be brought back, reduce
loads and use Main Bus or Non-Essential loads only as necessary for
flight conditions.
1.
ALT 1 Master Switch ................................................................OFF
2.
Alternator 1 Circuit Breaker............................ CHECK and RESET
3.
ALT 1 Master Switch ................................................................. ON
If alternator does not reset:
4.
Switch off unnecessary equipment on Main Bus 1, Main Bus 2,
and the Non-Essential Buses to reduce loads. Monitor voltage.
5.
ALT 1 Master Switch ................................................................OFF
6.
Land as soon as practical.
ALT 1 Light Flashing
Serials 1005 thru 1581
: The most likely cause is a severely discharged
battery along with heavy equipment loads. In this event, reduce loads
on Main and Non-Essential buses and monitor amperage until
charging rate is within normal limits. Then loads can be added as
required.
1.
Ammeter Switch ..................................................................... BATT
2.
If charging rate is greater than 30 amps, reduce load on Main Bus
1, Main Bus 2, and Non-Essential buses.
3.
Monitor ammeter until battery charge rate is less than 15 amps.
4.
When battery charge rate is within limits, add loads as necessary
for flight conditions.
ALT 2 Light Steady
Except during low RPM operations, steady illumination indicates a
failure of ALT 2. If alternator cannot be brought back, Essential bus
loads will be powered from ALT 1, BAT 1, and BAT 2.
• Note •
ALT 2 light will illuminate steady and ALT 2 will not come on
line until 1700 - 2200 RPM.
1.
ALT 2 Master Switch ................................................................OFF
Revision A5
Summary of Contents for SR20
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Page 22: ...2 2 P N 11934 003 Section 2 Cirrus Design Limitations SR20 Placards 2 21 Revision A6 ...
Page 308: ...9 2 P N 11934 003 Section 9 Cirrus Design Supplements SR20 Intentionally Left Blank Reissue A ...