CESSNA 172C — Airworthiness Directives

This document is an Airworthiness Directive (AD) issued by the Federal Aviation Administration (FAA) that supersedes an existing AD for various Cessna aircraft models, including the Cessna 172. It outlines mandatory inspection and maintenance procedures to address safety concerns related to seat slippage and the potential for pilots to lose control of the aircraft due to improper seat engagement. The AD requires repetitive inspections of seat components, including seat rails, rollers, and locking mechanisms, to ensure proper function and safety. The document is intended for aircraft owners, operators, and maintenance personnel, providing detailed instructions on compliance and safety measures to prevent accidents related to seat failures.

• This AD applies to multiple Cessna models, including the 172.
• Initial compliance is required within 100 hours TIS or 12 months after the effective date.
• Repetitive inspections must occur at intervals not exceeding 100 hours TIS or 12 months.
• Key measurements include a minimum seat locking pin engagement of 0.15 inches and tang thickness of 0.05 inches.
• Estimated inspection cost is $85 per aircraft.