CHAPTER 6 EXPANDED EMERGENCY AND ABNORMAL PROCEDURES
Page 6-8
091-00027-001 REV A Evolution Backup Display Pilot’s Guide
Page 6-9
091-00027-001 REV A
6.5. Loss of Aircraft Electrical Power
In the event that aircraft generated power is degraded or fails, the EBD will
automatically switch to its own dedicated battery (Figure 6-2). When continued safe
operation depends on the EBD, UNRESTORABLE LOSS OF EXTERNAL POWER IS AN
EMERGENCY SITUATION. The aircraft should divert to the nearest suitable airport.
Loss of or Degraded Aircraft Power or ON BAT Annunciation
1. Electrical System .....................................................Follow AFM procedures to restore
power
2. If unable to restore power ................................Land as soon as possible
The internal battery will normally provide between 30-60 minutes of operation at
approximately 20°C and warmer. At extreme cold temperatures, operation of the
internal battery is not assured.
When on battery the auto backlight intensity level defaults to 40% and manual
backlight intensity is limited to 70%. Changing the backlight intensity will aect the
battery duration, which is reected in the % remaining indication.
A fully charged battery will indicate a charge level of 99% for some time before
beginning to discharge. The charge level will steadily decrease when below 95%, with a
slight acceleration as the battery nears 0%.
The “ON BAT” annunciation, along with the estimated battery charge remaining, is
displayed whenever the system is operating on battery.
Figure 6-2
Battery Charge Remaining
091-00027-001 Rev A EBD Pilots Guide V&H .indb 9 8/27/14 8:51 AM
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