Jennifer Harrington

The FAA has issued a proposed Airworthiness Directive for GE CF34 turbofan engines with high-pressure-rotor, four-step, air-balance-piston, stationary seals to remove these seals and incorporate an eight-step seal at the next piece-part exposure. The agency is proposing this AD “to prevent the inability to restart both engines after flameout due to excessive friction of the four-step seal, which could result in subsequent forced landing of the airplane.”

News and information on safety procedures and concerns.

FAA Issues AD for CF34 Turbofans

The FAA has issued a proposed Airworthiness Directive for GE CF34 turbofan engines with high-pressure-rotor, four-step, air-balance-piston, stationary seal

2024 Corporate Aviation Leadership Summit

Amy Wilder

News and issues relating to business, corporate and private aviation, primarily regarding turbine-engine-powered airplanes and helicopters. Subjects include aircraft, engines, maintenance, operations, personnel, acquisitions, accidents, safety, security, and training.

Altitude and course deviation, traffic proximity remain top categories

ACSF Data Shows Stable Bizav Risk Amid 2026 Pressures

Kerry Lynch

News and issues relating to international air transport and cargo carriers, national airlines and regional airlines, including aircraft, engines, personnel, acquisitions, accidents, safety, security and training.

Essential news and analysis on the defense aerospace business. Your trusted source for new and ongoing programs and requirements in military aircraft (manned and unmanned), engines, avionics, weapons and associated systems, including ground-based air defense.

Aircraft remained within separation guidance but neared each other after the presidential helicopter was unable to alert ATC

Faulty Comms Preceded Marine One/Envoy Close Call

Graham leaving agency within months of confirmation to another term

NTSB Vice Chair Michael Graham To Retire October 2

Stuart “Kipp” Lau

News about bills, laws, regulations and other governmental decisions affecting aviation and aerospace. Topics include FAA re-authorizations, taxes on fuel and aviation activities, environmental legislation, ICAO decisions, governmental mediation of labor conflicts and World Trade Organization disputes and decisions.

UK CAA concerned over rise in unstable approaches continuing to land

AINsight: Go-arounds Are a Normal and Expected Outcome

News about significant aircraft accidents and information from accident reports.

News and issues regarding all manner of civil and military rotorcraft and their powerplants, including helicopters, tilt rotors and unmanned air vehicles.

Helicopters more than twice as vulnerable to loss of visual reference accidents than airplanes

TSB: Rotorcraft More Prone To Loss-of-visual-reference Accidents

Charlotte Bailey

News about environmental issues relating to aircraft operations, including noise issues, emissisions, and regulations. See Fuel for biofuel.

News and issues relating to the aerospace industry that are related to the science, engineering and business of flight in space involving civil, industrial and military applications, and similar topics related to flight in the atmosphere of the Earth that are not covered more directly by other AINonline subject channels. In other words, both astronautical and aeronautical subjects, except for those aeronautical topics that are specifically covered elsewhere on this website.

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ACSF Data Shows Stable Bizav Risk Amid 2026 Pressures

Altitude and course deviation, traffic proximity remain top categories

Faulty Comms Preceded Marine One/Envoy Close Call

Aircraft remained within separation guidance but neared each other after the presidential helicopter was unable to alert ATC

NTSB Vice Chair Michael Graham To Retire October 2

Graham leaving agency within months of confirmation to another term

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EASA: Atmospheric Icing Insufficiently Understood

European air safety agency calls for more comprehensive studies into phenomenon

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First episode features three-time space shuttle veteranJanet Kavandi

Li-ion Thermal Runaways on the Rise in Aircraft Cabins

Numbers are rising and the risk of a serious incident is increasing

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