CESSNA 402C — Service Bulletins

This document is an Emergency Airworthiness Directive (AD) issued by the FAA concerning the Cessna Models 402C and 414A. It addresses critical safety concerns related to cracking in the wing spars of these aircraft. The directive mandates immediate inspections and outlines specific procedures to detect and correct potential structural failures that could lead to loss of control during flight. The document is intended for all owners and operators of the affected aircraft models and emphasizes the importance of compliance with the outlined inspection protocols to ensure safety and airworthiness.

• Immediate inspections required for Cessna 402C and 414A due to wing spar cracking risks.
• Initial inspection at 10,000 hours TIS; repetitive inspections every 110 hours TIS until 15,000 hours TIS.
• Eddy current inspections of forward wing spars are mandatory, replacing previous visual inspection requirements.
• Report inspection findings to the FAA within 24 hours, detailing any cracks found.
• This AD supersedes previous directives and is effective immediately.