Flight Manual STEMME S6
Doc.-No.:P400-006.000 E
Page: 3-32
Revision: ---
Date of Issue: 07. October 2008
Agency approved
Date of Rev.: --.--.----
3.12.1.11 Sudden Rise of Manifold-Air-Pressure MAP and RPM
If the MAP and RPM suddenly rise and the
yellow TCU-caution-light
is
FLASHING, a malfunction of the turbocharger-control-unit is most likely:
1.
Control RPM and MAP with throttle (red MAP-warning-light must be
OFF)
Recommended operating limits:
≤
75% MCP
(MAP :
≤
31 inHg, engine speed
≤
5000 RPM)
2.
The waste-gate is possibly closed. Lower engine-power must be
expected. With the waste-gate closed, MAP-control is only possible
with the throttle.
If the MAP and RPM suddenly rise and the power can not be reduced with the
throttle, the throttle-cable is most likely broken. The power-setting rises by
spring-load to 115% full-throttle.
It is recommended to climb to a safe altitude for changing to the glider-
configuration and landing on a suitable airfield. Then TURN OFF the engine:
3.
Air-speed
~ 62 kts / 115 km/h
4.
At safety-altitude: fuel-shut-off-valve CLOSE
5.
After engine stops: Ignition
OFF
6.
After the engine has cooled down: change to glider-configuration (see
section 4.7.3.2) and land in glider-configuration.
Warning:
If the engine is restarted with the carburators set to full-
power, the drive-section might be severely damaged.
Caution:
If allowed engine-limits are exceeded, when the red MAP-
warning-light is ON or FLASHING, or when the yellow TCU-
caution-light is flashing, this must be documented by the pilot
in the A/C-logbook with details like: nature of incident, date,
duration and the degree of exceeding.