Section 3
Columbia 400 (LC41-550FG)
Emergency Procedures
Initial Issue of Manual: November 10, 2004
RC050002
Latest Revision Level/Date: -/11-10-2004
3-27
CAUTION
If the above steps do not restore oil temperature to normal, severe damage
or an engine failure can result. Reduce power to idle, and select a suitable
area for a forced landing. Follow the procedures described on page 3-9,
Emergency Landing Without Engine Power. The use of power must be
minimized and used only to reach the desired landing area.
Low Oil Pressure
– If oil pressure drops below 30 psi at normal cruise power settings without
apparent reason and the oil temperature remains normal, monitor both oil pressure and
temperature closely, and land as soon as possible for evaluation and repair. If a drop in oil
pressure from prescribed limits is accompanied by a corresponding excessive temperature
increase, engine failure should be anticipated. Reduce power and follow the procedures
described on page 3-9, Emergency Landing Without Engine Power. The use of power must be
minimized and used only to reach the desired landing area.
CAUTION
The engine oil annunciator is set to illuminate when the oil pressure is less
than 5 psi, which provides important information for ground operations. It is
not designed to indicate the onset of potential problems in flight.
Failure of Turbocharger
– Turbocharger failure may be evidenced by the inability of the
engine to develop manifold air pressure above the ambient pressure. The engine will revert to
“normally aspirated” and can be operated but will produce less than its rated horsepower. If
turbocharger failure occurs before takeoff, do not fly the aircraft. If a failure occurs in flight,
readjust mixture as necessary to obtain fuel flow appropriate to manifold air pressure and RPM.
An interruption in fuel flow or manifold pressure to the engine will result in turbocharger “run-
down”. At high altitude, merely restoring fuel flow may not cause the engine to restart, because
without turbocharger boost, the mixture will be excessively rich. If the engine does not fire, there
will be insufficient mass flow through the exhaust to turn the turbine. This condition may lead
one to suspect a turbocharger failure. Follow the procedures described on page 3-6, Engine
Failure During Flight Below 15,000 FT. or on page 3-7, Engine Failure During Flight Above
15,000 FT. Engine starting will be apparent by a surge of power. As the turbocharger begins to
operate, manifold pressure will increase and mixture can be adjusted accordingly. If manifold
pressure does not increase then the turbocharger has failed.
WARNING
If turbocharger failure is a result of a loose, disconnected or burned through
exhaust, then a serious fire hazard exists.
Failure of Engine Driven Fuel Pump
– In the event the engine driven fuel pump fails in flight
or during takeoff, there is an electrically operated backup fuel pump located in the wing area.
The first indication of failure of the engine driven pump is a drop in fuel flow followed by a
FUEL annunciator and a loss of engine power.
The backup pump is normally in the ARMED position for takeoff and climb and will be
activated if fuel pressure drops below 5.5 psi. In the cruise and descent configurations, the pump