DG Flugzeugbau DG-800A, Maintenance Manual, Page: 38 / 163

Maintenance Manual DG-808C
Issued: June 2005 1.25
1.14.6 Engine elapsed - time indicator:
The engine time indicator is incorporated in the DEI-NT and counts as
soon as the proximity switch detects that the propeller is turning and
therefore counts only the pure engine running time.
In addition the time to the next 25 hour maintenance will be displayed.
When the maintenance has been executed, this time must be reset to
zero in the DEI-NT set up menu.
1.14.7 Electric pumps:
First fuel pump: Power supply from the batteries and from the
generator (protection via a re-settable fuse in the control unit).
Coolant pump: Power supply from the batteries and with the engine
running directly from the generator (protection via a re-settable fuse in
the control unit).
Second fuel pump: Power supply only with the engine running directly
from the generator (protection via a re-settable fuse in the control unit)
1.14.8 12 V Socket:
The socket is located in the fuselage main-bulkhead (behind the pilots
left shoulder). It is used for:
- battery charging (main switch in charging position)
- to provide power for external accessories (main switch “on”).
Required plug see sect. 8.2.
Connection of the socket terminals: centre pin is positive.
1.14.9 Power plant extension-retraction mechanism:
See also sect. 1.12
Automatic extension and retraction is controlled by the control unit see
sect. 1.14.3.
The extension-retraction motor will be switched off at the end limits by
position switches see sect. 1.12.5.
Caution: If the proximity switch (see sect. 1.14.15) is defective (short circuit) a
safety interlock in the control unit prevents the engine from being retracted
automatically with the propeller not in the correct position. The retraction of the
powerplant must be done with the manual switch. The DEI-NT will display the
failure message “RPM Pickup”. The proximity switch must be exchanged prior
to the next engine start.