CESSNA AIRCRAFT COMPANY
FOR TRAINING USE ONLY
MODEL 152
3-13
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
magneto trouble. Assuming that spark plugs are the more likely cause, lean the mixture to the
recommended lean setting for cruise flight. If the problem does not clear up in several minutes,
determine if a richer mixture setting will produce smoother operation. If not, proceed to the nearest
airport for repairs using the BOTH position of the ignition switch unless extreme roughness dictates the
use of a single ignition position.
MAGNETO MALFUNCTION
A sudden engine roughness or misfiring is usually evidence of magneto problems. Switching from BOTH
to either L or R ignition switch position will identify which magneto is malfunctioning. Select different
power settings and enrichen the mixture to determine if continued operation on BOTH magnetos is
practicable. If not, switch to the good magneto and proceed to the nearest airport for repairs.
LOW OIL PRESSURE
If low oil pressure is accompanied by normal oil temperature, there is a possibility the oil pressure gage
or relief valve is malfunctioning. A leak in the line to the gage is not necessarily cause for an immediate
precautionary landing because an orifice in this line will prevent a sudden loss of oil from the engine
sump. However, a landing at the nearest airport would be advisable to inspect the source of trouble.
If a total loss of oil pressure is accompanied by a rise in oil temperature, there is good reason to suspect
an engine failure is imminent. Reduce engine power immediately and select a suitable forced landing
field. Use only the minimum power required to reach the desired touchdown spot.
ELECTRICAL POWER SUPPLY SYSTEM MALFUNCTIONS
Malfunctions in the electrical power supply system can be detected by periodic monitoring of the
ammeter and over-voltage warning light; however, the cause of these malfunctions is usually difficult to
determine. A broken alternator drive belt or wiring is most likely the cause of alternator failures,
although other factors could cause the problem. A damaged or improperly adjusted voltage regulator
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 rate of
charge and insufficient rate of charge. The paragraphs below describe the recommended remedy for
each situation.
EXCESSIVE RATE OF CHARGE
After engine starting and heavy electrical usage at low engine speeds (such as extended taxiing) the
battery condition will be low enough to accept above normal charging during the initial part of a flight.
However, after thirty minutes of cruising flight, the ammeter should be indicating less than two needle
widths of charging current. If the charging rate were to remain above this value on a long flight, the
Summary of Contents for 152 1978
Page 2: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 PAGE INTENTIONALLY BLANK ...
Page 6: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 1 2 PAGE INTENTIONALLY BLANK ...
Page 7: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 1 3 THREE VIEWS Figure 1 1 Three View ...
Page 8: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 1 4 PAGE INTENTIONALLY BLANK ...
Page 16: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 2 2 PAGE INTENTIONALLY BLANK ...
Page 24: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 2 10 PAGE INTENTIONALLY BLANK ...
Page 48: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 4 10 PAGE INTENTIONALLY BLANK ...
Page 78: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 6 2 PAGE INTENTIONALLY BLANK ...
Page 85: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 6 9 Figure 6 6 Sample Loading Problem ...
Page 86: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 6 10 Figure 6 7 Loading Graph ...
Page 144: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 9 4 PAGE INTENTIONALLY BLANK ...
Page 146: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 9 6 PAGE INTENTIONALLY BLANK ...
Page 150: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 9 10 PAGE INTENTIONALLY BLANK ...
Page 154: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 9 14 PAGE INTENTIONALLY BLANK ...
Page 164: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 9 24 PAGE INTENTIONALLY BLANK ...
Page 188: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 9 48 PAGE INTENTIONALLY BLANK ...
Page 192: ...CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY MODEL 152 9 52 PAGE INTENTIONALLY BLANK ...