SOLOY TURBINE PAC
SECTION 3
POHS CESSNA T206H/206H
EMERGENCY PROCEDURES
3-21
F.A.A. Approved
May 23, 2003
OIL CHIP DETECTOR
The Oil Chip Detector light on the instrument panel illuminates to indicate
possible internal deterioration of the engine or the propeller reduction
gearbox (there are three chip detectors in the oil system). Land as soon
as practicable if the light illuminates in flight.
ELECTRICAL POWER SUPPLY SYSTEM
MALFUNCTIONS
Malfunctions in the electrical power supply system can be detected by
periodic monitoring of the ammeter and low voltage annunciator (VOLTS);
however, the cause of these malfunctions is usually difficult to determine.
A broken generator wire is the most likely cause of failures, although other
factors could cause the problem. A damaged or improperly adjusted
Generator Control Unit (GCU) can also cause malfunctions. Problems of
this nature constitute an electrical emergency and should be dealt with
immediately. Electrical power malfunctions usually fall into two categories:
excessive generator output and insufficient generator output. The
paragraphs below describe the recommended remedy for each situation.
EXCESSIVE GENERATOR OUTPUT
After engine starting and heavy electrical usage, the battery condition
will be low enough to accept above normal charging during the initial
part of a flight. However, after 2 minutes of operation, the ammeter
should be indicating less than 80 amps. If the generator output were
to remain above this value, it would put an excessive load on the
electrical system. Electronic components in the electrical system
could be adversely affected by higher than normal voltage if a faulty
generator control unit (GCU) is causing the high output. To preclude
these possibilities, an overvoltage sensor will automatically trip the
generator system off at 32 volts, plus or minus 1 volt, and the VOLTS
annunciator light will illuminate. Assuming that the malfunction was
only momentary, an attempt should be made to reactivate the system.
To do this, press the generator reset switch, and the generator should
come back on again. If the problem no longer exists, normal
generator charging will resume and the annunciator light will go off
and the system should be checked at the completion of the flight.
If the light comes on again, a malfunction is confirmed. In this event,
the flight should be terminated and/or the current drain on the battery
minimized, because the battery can supply the electrical system for
only a limited period of time. If the emergency occurs at night, power
should be conserved for later use of the landing light and flaps during
landing.
UNCONTROLLED
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