
FAA APPROVED AIRPLANE FLIGHT MANUAL SUPPLEMENT
GARMIN G1000 INTEGRATED AVIONICS SYSTEM
DIAMOND MODEL DA 40
DIAMOND MODEL DA 40 F
190-00492-11 Rev 8 Diamond DA 40 / DA 40F
3-7
3.7.2 FAILURES IN THE ELECTRICAL SYSTEM
(b) Alternator failure
An alternator failure is indicated by a red ALTERNATOR message and an
ammeter indication of 0 Amps.
1. Circuit breakers ................................................................................. Check in
2. ALT (alternator) switch ........................................................... OFF, then ON
If alternator does not come back on line (message extinguishes and ammeter
indication greater than zero):
3. ESS BUS switch ....................................................................................... ON
4. Switch off any non-essential electrical loads.
5. Land within 30 minutes
If PFD attitude information is lost prior to landing:
6. HORIZON EMERGENCY Switch........................................................... ON
CAUTION
The following items are available on the Essential Bus:
• PFD in composite (backup) format
• NAV/COM 1
• GPS 1
• Attitude and Heading Reference System (AHRS)
• Air Data Computer
• Pitot heat
• Engine instruments
• Transponder
• Flood light
• Landing light
Refer to the ESSENTIAL BUS area of the circuit breaker panel for a
quick reference to equipment on those busses. These items of equipment
can be supplied with power by the battery for at least 30 minutes.
During this 30-minute period, the airplane must be landed at a suitable
airport. Economical use of electrical equipment, in particular of pitot
heat, and switching off equipment that is not needed extends the time
during which the other equipment remains available.
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