Which condition involves conducting an aircraft inspection?

Flight Condition 4 refers specifically to the requirement of conducting an aircraft inspection. This condition typically signifies that the aircraft is not in a flight-ready state and necessitates a thorough check or inspection to ensure its airworthiness before it can be released for flight operations. Conducting an inspection is crucial for identifying any potential issues, mechanical failures, or compliance with maintenance protocols that could affect safety.

The context of this condition emphasizes the importance of regular inspections in aviation to uphold safety standards. Inspections help in maintaining the aircraft's operational integrity, ensuring that it is capable of safe flight. Thus, recognizing and performing inspections when under Flight Condition 4 is vital for pilot preparedness and overall flight safety.