EASA Regulations for Bell Textron Inc. (Bti) 412

23 airworthiness directives and regulations affecting Bell Textron Inc. (Bti) 412.

EASA AD 2014-0118R1

Main Rotor Drive — Engine-to-Transmission Drive Shaft Line Nuts — Inspection / Replacement

EASA Airworthiness Directive 2014-0118R1 is a regulatory document addressing the inspection and replacement of engine-to-transmission drive shaft line nuts on Bell Helicopter Textron Inc. 212, 412, and 412EP helicopter models. The directive focuses on nuts with part numbers MS21042L4 and MS21042L5, which were found to be susceptible to cracking due to a production defect causing hydrogen embrittlement. This AD mandates inspections and replacement procedures to prevent potential loss of main rotor power.

Sep 25, 2018

Airworthiness DirectiveMaintenanceSafety MgmtBell Textron Inc. (Bti) 212Bell Textron Inc. (Bti) 412Bell Helicopter Textron 212Bell Helicopter Textron 412Bell Helicopter Textron 412EP

EASA AD US-2018-16-14

Emergency Flotation Section - Emergency Flotation System Tube Assembly - Replacement

The Federal Aviation Administration's Airworthiness Directive 2018-16-14 mandates the replacement of the emergency flotation system (EFS) tube assembly part number 412-073-820-101 on Bell Helicopter Textron Inc. Model 212, Model 412, and Model 412EP helicopters. This directive addresses a manufacturing defect that may cause cracks in the EFS tube assembly, potentially leading to failure of emergency floats during water landings. The AD aims to ensure continued airworthiness and safety of these helicopter models.

Sep 4, 2018

Airworthiness DirectiveMaintenanceSafety MgmtBell Textron Inc. (Bti) 212Bell Textron Inc. (Bti) 412Bell Helicopter Textron Inc. 212Bell Helicopter Textron Inc. 412Bell Helicopter Textron Inc. 412EP

EASA AD US-2018-17-01

SUPERSEDED BY FAA AD 2019-09-02

Airworthiness Directive 2018-17-01 supersedes AD 2017-15-02 and applies to Bell Helicopter Textron, Inc. Model 212, 412, 412CF, and 412EP helicopters. It addresses unsafe conditions related to certain Circor Aerospace engine oil and fuel check valves, part numbers 209-062-520-001 and 209-062-607-001, manufactured between October 2011 and March 2015, excluding those marked with "TQL". The directive requires inspection and replacement of these check valves to prevent potential engine failure or fire.

Aug 27, 2018

Airworthiness DirectiveMaintenanceSafety MgmtBell Textron Inc. (Bti) 212Bell Textron Inc. (Bti) 412Bell Helicopter Textron 212Bell Helicopter Textron 412Bell Helicopter Textron 412CFBell Helicopter Textron 412EP