Airplane Flight
Manual Cessna
F
150
L
Nr. 160
Converted with kit
NS402S with ROTAX 912 S3 and
Page:
3-11
HOFFMANN HO-V352F/170FQ+10
Edition 1
6)
If the overvoltage conditions remains
a.
Circuit breaker
„Gen. Feld 1“ ..................... Push
b.
Circuit breaker
„Gen. Feld 2“ ..................... Pull
c.
50A-Circuit breaker
„Generator 2“ ............. Pull
d.
Main switch ............................................... OFF then ON
e.
Over voltage.............................................. check
f.
If there is no overvoltage/operations resumed normal
i.
Emergency procedure ....................... Complete
g.
If the overvoltage conditions remains
i.
Generator-Main switch
„Gen“ ............. OFF
ii.
Circuit breaker
„Generator 1“ ............. PULL
iii.
Circuit breaker
„Generator 2“ ............. PULL
iv.
Emergency procedures ...................... Complete(Problem not solved
If the problem no longer exists, normal alternator charging will resume, and the warning light
will go off. If the light illuminates 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 must be conserved for later use of the landing light and flaps during landing.
INSUFFICIENT CHARGE
If the ammeters indicate a steady discharge in flight, the alternators will not provide enough
power to the system. The faulty generator should then be determined and switched off as
described above, since supplying the generator field winding could be an unnecessary load on
the system. All equipment not essential for the flight should be switched off and the flight
terminated as soon as possible.
ROUGH ENGINE OPERATION OR LOSS OF POWER
CARBURETOR ICING
Gradual airspeed drop and rough engine running can be due to ice formation in the carburetor.
To remove the ice, apply full throttle and pull the carburetor heat control knob until the engine
runs smoothly again. Then switch off the carburetor heating and reset the throttle control. If the
conditions require constant use of carburetor heating in cruising flight, use only the pre-heat
required to prevent icing (indicated by the smoothest engine run).
SPARK PLUG FOULING
A slight engine roughness in flight may be caused by one or more spark plugs becoming
fouled by carbon or lead deposits. This may be verified by turning the ignition switch
momentarily from BOTH to either L or R position. An obvious power loss in single ignition
operation is evidence of spark plug or ignition system trouble. Assuming that spark plugs are
the more likely cause, determine if a change in cruise power setting would fix the problem. If
not, proceed to the nearest airport for repairs using power setting resulting smoothest engine
run.
Summary of Contents for CESSNA 150
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