How long is a daily inspection valid if no flight occurs and no maintenance beyond servicing is done?

A daily inspection is valid for 72 hours, provided that no flight occurs and no maintenance beyond routine servicing has taken place. This is established to ensure that the aircraft remains in a condition for safe operation. The 72-hour window allows for a safety buffer, accommodating potential changes in environmental conditions or the operational integrity of the aircraft while it remains grounded.

The rationale behind the 72-hour validity is rooted in the need for aircraft to undergo regular checks to ensure that all systems are functioning properly and that no issues arise during the period of inactivity. After this time frame, the aircraft is required to undergo another inspection to validate its airworthiness, ensuring compliance with safety standards.