Miscellaneous Malfunctions Flashcards
Loss of r.p.m. during cruise flight (non-altitude engines)
Probable Cause: Carburetor or induction icing or air filter clogging
Solution:Apply carburetor heat. If dirty filter is suspected and non-filtered air is available,
switch selector to unfiltered position.
Loss of manifold pressure during cruise flight
Probably Cause: Carburetor or induction icing or air filter clogging.
Or Turbocharger failure
Solution:
Apply carburetor heat. If dirty filter is suspected and non-filtered air is available,
switch selector to unfiltered position.
Or
Possible exhaust leak. Shut down engine or use lowest practicable power setting.
Land as soon as possible.
Gain of manifold pressure during cruise flight
Probable Cause:
Throttle has opened, propeller control has decreased r.p.m., or improper method of power reduction
Solution:
Readjust throttle and tighten friction lock. Reduce manifold pressure prior to reducing r.p.m.
High oil temperature
Probable Cause/Solution
Oil congealed in cooler - Reduce power. Land. Preheat engine.
Inadequate engine cooling - Reduce power. Increase airspeed.
Detonation or preignition -Observe cylinder head temperatures for high reading. Reduce manifold pressure. Enrich mixture.
Forth coming internal engine failure - Land as soon as possible or feather propeller and stop engine.
Defective thermostatic oil cooler control - Land as soon as possible. Consult maintenance personnel.
Low oil temperature
Probable Cause:
Engine not warmed up to operating temperature
Solution:
Warm engine in prescribed manner.
High oil pressure
Probable Cause/Solution:
Cold oil- Warm engine in prescribed manner.
Possible internal plugging - Reduce power. Land as soon as possible.
Low Oil Pressure
Probable Cause/Solution:
Broken pressure Relief Valve-
Insufficient oil-
Burned out bearings-
ALL: Land as soon as possible or feather propeller and stop engine.
Fluctuating oil pressure
Probable Cause:
Low oil supply, loose oil lines, defective pressure relief valve
Solution:
Land as soon as possible or feather propeller and stop engine.
High cylinder head temperature
Probable Cause/Solution
Improper cowl flap adjustment -
Adjust cowl flaps.
Insufficient airspeed for cooling -
Increase airspeed.
Improper mixture adjustment -
Adjust mixture.
Detonation or preignition-
Reduce power, enrich mixture, increase cooling airflow.
Low cylinder head temperature
Probable Cause/Solution
Excessive cowl flap opening -
Adjust cowl flaps.
Excessively rich mixture-
Adjust mixture control.
Extended glides without clearing engine-
Clear engine long enough to keep temperatures at minimum range.
Ammeter indicating discharge
Probable Cause:
Alternator or generator failure
Solution:
Shed unnecessary electrical load. Land as soon as practicable.
Load meter indicating zero
Probable Cause:
Alternator or generator failure
Solution:
Shed unnecessary electrical load. Land as soon as practicable.
Surging r.p.m. and overspeeding
Probable Cause/Solution:
Defective propeller-
Adjust propeller r.p.m.
Defective engine-
Consult maintenance.
Defective propeller governor-
Adjust propeller control. Attempt to restore normal operation.
Defective tachometer-
Consult maintenance.
Improper mixture setting-
Readjust mixture for smooth operation.
Loss of airspeed in cruise flight with manifold pressure and r.p.m. constant
Probable Cause:
Possible loss of one or more cylinders
Solution:
Land as soon as possible.
Rough running engine
Probable Cause/Solution:
Improper mixture control setting-
Adjust mixture for smooth operation.
Defective ignition or valves -
Consult maintenance personnel.
Detonation or preignition-
Reduce power, enrich mixture, open cowl flaps to reduce cylinder head temp. Land as soon as practicable.
Induction air leak-
Reduce power. Consult maintenance.
Plugged fuel nozzle (Fuel injection) -
Reduce power. Consult maintenance.
Excessive fuel pressure or fuel flow -
Lean mixture control.
