EASA Regulations for Air Tractor AT-400

7 airworthiness directives and regulations affecting Air Tractor AT-400.

EASA AD 2022-0234

Engine Controls — Propeller Governor — Replacement

EASA Airworthiness Directive 2022-0234 is an official regulatory document addressing the replacement of propeller governors on GE Aviation Czech M601, H75, H80, and H85 engines installed on single-engine aeroplanes such as the Air Tractor AT-400 and AT-500 series, Allied Ag Cat G-164 series, and Thrush Aircraft 510G and S-2R series. The directive mandates replacing certain propeller governors with updated serviceable parts to ensure continued airworthiness and safety.

Dec 1, 2022

Airworthiness DirectiveMaintenanceSafety MgmtGe Aviation Czech H75, H80, H85Ge Aviation Czech M601Air Tractor AT-400Air Tractor AT-500Allied Ag Cat G-164Thrush Aircraft 510GThrush Aircraft S-2R

EASA AD 2022-0034

Engine — Outer Liner Dilution Tube — Inspection

EASA Airworthiness Directive 2022-0034 is an airworthiness directive addressing the inspection of the outer liner dilution tube on GE Aviation Czech M601 and H-series engines. It applies to multiple engine models including M601D, M601E, M601F, M601Z, H75, H80, and H85 series, which are installed on various aircraft such as the Air Tractor AT-400 and AT-500 series, Grumman G-164 series, and Viking Air DHC-3 Otter among others. The directive mandates repetitive borescope inspections of specific outer liner parts to detect cracks and prevent potential engine power loss.

Mar 4, 2022

Airworthiness DirectiveMaintenanceSafety MgmtGe Aviation Czech H75, H80, H85Ge Aviation Czech M601Air Tractor AT-400Air Tractor AT-500Grumman G-164Viking Air DHC-3 Otter

EASA AD US-2021-05-14

Flight Controls - Trailing Edge Flap Control System - Inspection / Replacement

Federal Aviation Administration Airworthiness Directive 2021-05-14 is a final rule addressing cracks in the flap torque tube actuator attachment brackets on all Air Tractor, Inc. Models AT-250 through AT-802A airplanes. The directive mandates repetitive visual and dye penetrant inspections of the flap actuator attachment bracket welds and requires replacement of any cracked torque tubes to prevent flap actuator detachment. This AD aims to ensure continued safe operation of affected Air Tractor aircraft by mitigating the risk of sudden flap retraction and potential loss of control.

Mar 29, 2021

Airworthiness DirectiveMaintenanceSafety MgmtAir Tractor AT-250Air Tractor AT-300Air Tractor AT-400Air Tractor AT-401Air Tractor AT-402Air Tractor AT-500Air Tractor AT-600Air Tractor AT-800Air Tractor AT-602Air Tractor AT-802Air Tractor AT-802A

EASA AD 2017-0151R1

Engine — Exhaust System — Modification

EASA Airworthiness Directive 2017-0151R1 is a regulatory document addressing modification requirements for the exhaust system of GE Aviation Czech M601, H75, H80, and H85 series engines. These engines are commonly installed on aircraft such as Thrush Aircraft Inc. S-2R, PZL-106 Kruk, Air Tractor AT-300/400/500 series, Allied Ag Cat G-164 series, RUAG Do 28, and Aircraft Industries L-410. The directive mandates modifications to prevent potential power turbine or quill shaft spline failures that could lead to engine overspeed and subsequent safety hazards.

Dec 5, 2018

Airworthiness DirectiveMaintenanceSafety MgmtGe Aviation Czech H75, H80, H85Ge Aviation Czech M601Thrush Aircraft Inc. S-2RPZL-106 KrukAir Tractor AT-300Air Tractor AT-400Air Tractor AT-500Allied Ag Cat G-164RUAG Do 28Aircraft Industries L-410

EASA SIB CE-11-57

Air Tractor, Inc. AT-400 and AT-402 Series Aeroplanes — Engine Mount Section

The Special Airworthiness Information Bulletin SAIB: CE-11-57 is an FAA informational bulletin addressing an airworthiness concern for Air Tractor, Inc. Models AT-400, AT-400A, AT-402, AT-402A, and AT-402B airplanes. It highlights the need for inspections of the engine mount attach tubes for fatigue cracking, particularly at the left hand firewall attach location, but does not mandate regulatory action. The bulletin provides guidance on inspection procedures and reporting for affected aircraft under Type Certificate Data Sheets A9SW and A17SW.

Sep 16, 2011

Safety Information BulletinMaintenanceSafety MgmtAir Tractor AT-400Air Tractor AT-400AAir Tractor AT-402Air Tractor AT-402AAir Tractor AT-402B

EASA SIB CE-11-41

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.

Jul 4, 2011

Safety Information BulletinMaintenanceSafety MgmtAir Tractor AT-300Air Tractor AT-301Air Tractor AT-302Air Tractor AT-400Air Tractor AT-400AAir Tractor AT-401Air Tractor AT-401AAir Tractor AT-401BAir Tractor AT-402Air Tractor AT-402AAir Tractor AT-402BAir Tractor AT-501Air Tractor AT-502Air Tractor AT-502AAir Tractor AT-502BAir Tractor AT-503Air Tractor AT-503AAir Tractor AT-504

EASA SIB CE-11-30

Air Tractor, Inc. (all types & models) - Airframe Structure Corrosion

The Special Airworthiness Information Bulletin SAIB: CE-11-30 is an informational document issued by the FAA addressing airframe structure corrosion in all Air Tractor, Inc. model series AT-250, AT-300, AT-400, AT-500, AT-600, and AT-800 aircraft. It highlights the susceptibility of these aircraft to severe corrosion due to their operation in harsh environments such as chemical dispersal and firebomber missions. The bulletin provides guidance on inspection and repair procedures but does not mandate regulatory action.

May 11, 2011

Safety Information BulletinMaintenanceSafety MgmtAir Tractor AT-250Air Tractor AT-300Air Tractor AT-400Air Tractor AT-500Air Tractor AT-600Air Tractor AT-800