CHAPTER 6
EXP
ANDED EMERGENC
Y AND ABNORMAL PROCEDURES
EFD1000/500 MFD Pilot’s Guide
Page 6-4
091-00006-001 REV B
EFD1000/500 MFD Pilot’s Guide
Page 6-5
091-00006-001 REV B
6.5.
Loss of or Degraded Aircraft Power or ON BAT
Annunciation
In the event that aircraft generated power to the EFD is degraded or fails, each EFD will
automatically switch to its own dedicated battery (
Figure 6-3
). When continued safe
operation depends on the EFD1000,
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.
The external Emergency Backup Battery will provide at least 30 minutes of operation
with an 80% charge state at 20°C. When fully charged and at a nominal temperature of
20°C or warmer, the EBB will typically provide power to operate the EFD1000 for two or
more hours.
When on battery (internal or EBB) the auto backlight intensity defaults to 40% and
manual backlight intensity is limited to 70%. Changing the backlight intensity will affect
the battery duration, which is reflected in the % remaining indication.
A fully charged battery will indicate a charge level of 99% for some time before
beginning to decay. 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 6-3
Internal Battery Operational
CAUTION
If any EFD system battery is permitted to operate until it
is exhausted, the screen may go solid white for several
seconds before blanking. To avoid this condition at
night, the pilot should manually turn off the EFD when
the display reaches 0% battery remaining.
NOTE
Whenever it is operating from the internal battery or
the EBB, the EFD also powers the RSM GPS, if installed.