Effectivity: 914 Series BRP-Powertrain page 4-2
OM Edition 2 / Rev. 0 April 01/2010
d05037.fm
4.1) Sudden drop of boost pressure and speed
Sudden drop of
boost pressure
and speed
Any exceeding of the max. admissible engine speed or boost
pressure has to be recorded by the pilot in the logbook, stating the
duration, exact time and extent of exceeding.
NOTE: A minimum performance of approx. 66 kW
(88 HP) remains available.
4.2) Sudden rise of boost pressure and speed
Sudden rise of
boost pressure
and speed
Any exceeding of the max. admissible engine speed or boost
pressure has to be recorded by the pilot in the logbook, stating the
duration, exact time and extent of exceeding.
Loud noise or bang
Possible cause Remedy
Fracture of the turbo Look for landing possibility.
Flight with reduced performance may
be possible.
Monitor oil pressure.
Orange caution lamp of TCU (turbo control unit) is blinking
Possible cause Remedy
Wastegate does not close Limited flying operation as possibly
wastegate does not respond.
Orange caution lamp of TCU (turbo control unit) is blinking
Possible cause Remedy
Wastegate fully closed Immediately reduce engine speed
until boost pressure and speed are
within operating limits.
Limited flying operation as wastegate
may be fully closed and control of the
boost pressure is only possible via
throttle lever.
Bowden cable(s) for actuation of throttle valve(s) broken
Possible cause Remedy
Due to spring pressure the throt-
tle valve(s) will be fully open - full
throttle!
Limited flying operation as wastegate
may be fully closed and control of the
boost pressure and rpm is only pos-
sible via ignition unit.
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