Aviation Mechanic - General, Airframe, and Powerplant › III. Powerplant › Task G. Engine Lubrication Systems

AM.III.G.K7

Knowledge

Excessive aircraft engine oil consumption.

Study note

Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Pilot's Handbook of Aeronautical Knowledge p. 7-17
Chapter 7: Aircraft Systems › Oil Systems
power, excessive oil consumption, detonation, and serious engine damage. While the oil system is vital to the internal cooling of the engine, an additional method of cooling is necessary for the engine’s external surface. Most small aircraft ... check the engine oil level during the preflight inspection. Air cooling is accomplished by air flowing into the engine compartment through openings in front of the engine cowling. Baffles route this air over fins attached to the engine cylinders…
Aviation Maintenance Technician Handbook - Powerplant p. 3-4
Chapter 3: Induction & Exhaust Systems › Basic Carburetor Induction System › Induction System Filtering
serious source of trouble to an aircraft engine. Dust consists of small particles of hard, abrasive material that can be carried by the air and drawn into the engine cylinders. It can also collect on the fuel-metering elements ... clog an oil passage and cause oil starvation. Although dust conditions are most critical at ground level, continued operation under such conditions without engine protection results in extreme engine wear and can produce excessive oil consumption. When operation…
Aviation Maintenance Technician Handbook - Powerplant p. 6-4
Chapter 6: Lubrication & Cooling Systems › Reciprocating Engine Lubrication Systems › Combination Splash & Pressure Lubrication
Combination Splash & Pressure Lubrication The lubricating oil is distributed to the various moving parts of a typical internal combustion engine by one of the three following methods: pressure, splash, or a combination of pressure and splash. The pressure lubrication system ... principal method of lubricating aircraft engines. Splash lubrication may be used in addition to pressure lubrication on aircraft engines, but it is never used by itself; aircraft-engine lubrication systems are always either the pressure type or the combination pressure…
Aviation Maintenance Technician Handbook - Powerplant p. 6-4
Chapter 6: Lubrication & Cooling Systems › Reciprocating Engine Lubrication Systems
This preservative oil should be removed at end of the first 25 hours of operation. When adding oil during the period when preservative oil is in the engine, use only aviation grade straight mineral oil or ashless dispersant oil ... required, of the viscosity desired. If ashless dispersant oil is used in a new engine, or a newly overhauled engine, high oil consumption might possibly be experienced. The additives in some of these ashless dispersant oils may retard the break…