EASA Regulations for Air Tractor AT-401

3 airworthiness directives and regulations affecting Air Tractor AT-401.

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New ADs and bulletins for Air Tractor AT-401, summarized like the ones below, every Monday.

EASA AD US-2021-05-14

Mar 29, 2021

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.

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

EASA SIB SAFO15007

Jul 15, 2015

Pratt & Whitney R-985 (Wasp Junior) Engines — Flyweight Hardware Failures

SAFO 15007 is a Safety Alert for Operators issued by the FAA regarding Pratt & Whitney R-985-AN-14B (Wasp Junior) engines. It addresses failures caused by fatigued flyweight screws and improperly modified or under-torqued expanders, which have led to in-flight engine failures and forced landings. The alert also applies to other Pratt & Whitney Wasp Jr (R-985 Series) and Wasp (R-1340 Series) engines used in various aircraft including Air Tractor AT-301 and 401, Ayres Thrush, Beechcraft D17 and 18 series, Boeing-Stearman 75, de Havilland DHC-2 and DHC-3, Gee Bee, Grumman G-21 and G-164, Howard DGA-6, -11, -15, North American T-6, and Weatherly 201 and 620.

Safety Information Bulletin
  • Air Tractor AT-301
  • Air Tractor AT-401
  • Ayres Thrush
  • Beechcraft D17
  • Beechcraft 18
  • Boeing-Stearman 75
  • de Havilland DHC-2
  • de Havilland DHC-3
  • Gee Bee
  • Grumman G-21
  • Grumman G-164
  • Howard DGA-6
  • Howard DGA-11
  • Howard DGA-15
  • North American T-6
  • Weatherly 201
  • Weatherly 620

EASA SIB CE-11-41

Jul 4, 2011

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.

Safety Information Bulletin
  • Air Tractor AT-300
  • Air Tractor AT-301
  • Air Tractor AT-302
  • Air Tractor AT-400
  • Air Tractor AT-400A
  • Air Tractor AT-401
  • Air Tractor AT-401A
  • Air Tractor AT-401B
  • Air Tractor AT-402
  • Air Tractor AT-402A
  • Air Tractor AT-402B
  • Air Tractor AT-501
  • Air Tractor AT-502
  • Air Tractor AT-502A
  • Air Tractor AT-502B
  • Air Tractor AT-503
  • Air Tractor AT-503A
  • Air Tractor AT-504