EASA Regulations for Air Tractor AT-401B

Air Tractor, Inc. AT-300, AT-400 and AT-500 Series - Fuselage-to-Wing Attachment Fittings

The Air Tractor, Inc. AT-300, AT-400 and AT-500 Series - Fuselage-to-Wing Attachment Fittings Special Airworthiness Information Bulletin (SAIB: CE-11-41) informs owners and operators of Air Tractor AT-300, AT-400, and AT-500 series aircraft about potential fatigue cracking in the fuselage frame wing attach tubes. This bulletin covers models including AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-401B, AT-402, AT-402A, AT-402B, AT-501, AT-502, AT-502A, AT-502B, AT-503, AT-503A, and AT-504. It provides inspection guidance but does not mandate regulatory action.