Teledyne Continental Motors, Inc.
TM
Glossary
IOF-240 Series Engine Maintenance and Overhaul Manual
A-5
29 November 2006
A-2.
Glossary
Term Definition
Airworthiness
Approval Tag
FAA Tag 8130-3 that identifies a part or group of parts that has been deemed
airworthy by an authorized FAA representative.
Best Power/Best
Economy Switch
Cabin-mounted switch that allows for certain levels of pilot control of the
calibration function.
Boost Pump Mode
Switch
Used to select the operating mode for the aircraft’s electric fuel pump. There are
two possible operating modes (OFF or AUTOMATIC).
Burning
In reference to the engine valves, indicates roughening or erosion due to high
temperature gases escaping past valve faces. In other instances, it indicates
drawing of the temper of steel parts to a soft (blue) condition, as a result of
overheating, during an absence of lubrication on moving surfaces, such as gear
teeth subject to high loading.
Burr
Sharp or rough projection of metal.
Chafing
Condition caused by a rubbing action between adjacent or contacting parts under
light pressure which results in wear.
Channel Lamp
Four HSA panel lamps that indicate some level of fault or system operating
condition with the associated control channel. Each channel is assigned to a
specific cylinder
Crack
Partial separation of material usually caused by vibration, overloading, internal
stresses, improper assembly, or fatigue.
Critical Service
Bulletin
Service document based on determination by the product manufacturer to
constitute a threat to continued safe operation of an aircraft or to persons or
property on the ground unless the owner or operator takes some specific action
(inspection, repair, replacement, etc.). Documents in this category are
candidates for incorporation into an Airworthiness Directive issued by the FAA.
Dent
Rounded depressed, pushed-in area on a surface.
Dynamic Seal
Cylinder seal that consists of the piston rings to the cylinder wall seal.
Elongate To
stretch out or lengthen.
Erosion
Wearing away of material due to flow, hot gases, grit, or chemicals.
FADEC Lamp
A Health Status Annunciator lamp used by the FADEC System to indicate a fault
condition that may require an immediate emergency response by the pilot.
Fretting
Surface erosion caused by slight movement between two parts that are fastened
together.
Galling
Severe chafing or fretting that results in transfer of metal from one part to
another; usually caused by slight movement of mated parts that have limited
relative motion and are under heavy loads.
Grooved Surface
Shallow channels, wider than scratches and usually smooth resulting from wear
affected by concentrated contact stress.
