What conditions should a mechanic look for during a regular inspection of the exposed piston section of a landing gear?

During a regular inspection of the exposed piston section of a landing gear, mechanics need to focus on several specific conditions to ensure safe operation. The correct choice emphasizes cleanliness, evidence of damage, and proper extension, which are critical considerations for maintaining the landing gear's functionality and safety.

Cleanliness is paramount because any dirt, debris, or contaminants can interfere with the proper operation of the landing gear. In particular, particles can cause wear on the seals and sliding surfaces, leading to leaks or malfunction.

Evidence of damage is another key aspect. This includes checking for dents, scratches, or any surface irregularities that can indicate a problem that needs to be addressed. Damage can compromise the structural integrity of the landing gear and lead to failure during operation.

Proper extension ensures that the landing gear is deploying and retracting as intended. Any deviation from the expected extension can indicate hydraulic issues or mechanical failures, which require further investigation.

Other conditions mentioned in alternative answers, such as rust, excessive play, or loose components, while relevant to various components of aircraft inspection, do not cover the comprehensive aspects necessary for the exposed piston section specifically. The focus in the correct choice provides a proactive approach to maintaining landing gear reliability and safety.