Which components must be inspected on a 100-hour or annual inspection for a reciprocating-engine lubrication system?

Which components must be inspected on a 100-hour or annual inspection for a reciprocating-engine lubrication system?

• A. The oil sump or tank, the oil strainer screen, the oil filter, the oil cooler and the temperature control valve, the oil pressure and temperature gauges and any transmitters associated with them, and the entire engine for indication of oil leaks.
• B. Only the oil sump and filter.
• C. Only the gauges.
• D. Only the oil cooler.

Answer: (A)

The main thing being tested is which parts of the lubrication system must be examined during a 100-hour or annual inspection of a reciprocating engine. The comprehensive set includes all components that hold, filter, cool, monitor, and leak-check the oil: the oil sump or tank; the oil strainer screen; the oil filter; the oil cooler and the temperature control valve; the oil pressure and temperature gauges and any transmitters associated with them; and the entire engine checked for signs of oil leaks. Each piece matters: the sump holds the oil, the strainer and filter remove particulates, the cooler and valve manage oil temperature, the gauges and transmitters verify that pressure and temperature stay in safe ranges, and inspecting for leaks catches potential failures that could lead to loss of lubrication. Other options omit essential parts (for example, focusing only on the sump and filter or only on gauges), which would not provide a full check of the lubrication system.

The main thing being tested is which parts of the lubrication system must be examined during a 100-hour or annual inspection of a reciprocating engine. The comprehensive set includes all components that hold, filter, cool, monitor, and leak-check the oil: the oil sump or tank; the oil strainer screen; the oil filter; the oil cooler and the temperature control valve; the oil pressure and temperature gauges and any transmitters associated with them; and the entire engine checked for signs of oil leaks. Each piece matters: the sump holds the oil, the strainer and filter remove particulates, the cooler and valve manage oil temperature, the gauges and transmitters verify that pressure and temperature stay in safe ranges, and inspecting for leaks catches potential failures that could lead to loss of lubrication. Other options omit essential parts (for example, focusing only on the sump and filter or only on gauges), which would not provide a full check of the lubrication system.