LS10-s / LS10-st - DG Flugzeugbau

Flight manual <strong>LS10</strong>-s,-st
3.11 Loss of electrical power in flight or defective DEI-NT (only <strong>LS10</strong>-st)
With such a defect there will be no OAT indication. Therefore only dump
waterballast at altitudes min. 1000 ft below the values of the flight
conditions given in section 2.17 to prevent water freezing when dumping
the ballast.
3.11.1 With the engine retracted:.
Continue flying as pure sailplane, engine extension will not be possible!
3.11.2 With engine extended and not running
The electrical fuel pump will not operate and therefore fuel to the engine is
only supplied by the mechanical fuel pump.
If the engine is fully extended, engine start is possible. However, expect
considerably higher altitude required for starting due to poor fuel supply
during start, especially with a cold engine.
Therefore avoid engine re-start at low altitude when an electrical system
failure occurs.
Search for a suitable field and perform a precautionary landing
For landing with an extended engine refer to section 3.14.
3.11.3 With engine extended and running
Do not switch off the engine and proceed to next airfield. The maximum
powerplant extended speed must not be exceeded during descent with
engine running. Switch off the engine before landing if possible.
For landing with an extended engine refer to section 3.14.
Note: Without electrical power no information regarding engine-RPM, amount of
fuel and OAT can be provided by the DEI-NT.
Therefore observe maximum powerplant extended speed and be prepared
for an engine stop when fuel tank is empty. Water in the ballast tanks must
be dumped before landing.
3.12 Engine extension / retraction system – Circuit breaker open
The spindle drive is protected by an automatic circuit breaker in the control
unit, which cannot be manually switched.
If this circuit breaker opens due to a system overload caused by spindle
overload (e.g.aerodynamic loads) or mechanical blocking, this situation is
indicated as shown below:
- The DEI-NT display indicates „Failure: Spindle Fuse“. This
indication disappears if the self set-back system of the circuit breaker
operates. Further it can be removed by pushing the selector knob.
- The DEI-NT display indicates “F” in the center, upper right section
until circuit breaker has automatically been closed. The automatically
self set back process of the circuit breaker may take up to 5 seconds.
- At the same time the engine control changes into manual mode.
Issued: October 2009 EASA app. 3.5