What is the certification basis for the engine of a Piper PA-28-235?

The certification basis for the engine of a Piper PA-28-235 is 14 CFR Part 23. This regulatory framework outlines the airworthiness standards for normal, utility, acrobatic, and commuter category airplanes, which includes light aircraft like the PA-28-235. The engine must meet the requirements set forth in this part, which pertains specifically to the design, performance, and safety of aircraft engines used in this category of aircraft.

Part 3 of the Civil Air Regulations (CAR), which was an earlier standard, is outdated and was superseded by the more current Federal Aviation Regulations (FAR). While CAR Part 13 and Part 25 pertain to other regulatory concerns, they do not set the applicable standards for the engine of the Piper PA-28-235.

It's essential to understand that regulations evolve, and the transition from CAR to FAR was a significant part of aviation safety and standardization, ensuring that aircraft like the PA-28-235 are held to modern safety and performance standards.