Emergency airworthiness directive

Lore & Background

Emergency airworthiness directives have been issued following notable incidents. On May 25, 1979, American Airlines Flight 191, a McDonnell Douglas DC-10, crashed after takeoff from Chicago O'Hare Airport when an engine separated, leading to the type being grounded in June 1979. On August 20, 2007, China Airlines Flight 120, a Boeing 737-800, caught fire after landing at Naha Airport; the FAA issued an EAD on August 25 ordering inspection of all Boeing 737NG series aircraft within 24 days. On October 7, 2008, Qantas Flight 72 experienced uncommanded pitch-down manoeuvres, resulting in 107 injuries; on January 15, 2009, EASA issued an EAD addressing the A330 and A340 Northrop-Grumman ADIRU problem.

On January 16, 2013, the FAA issued an EAD grounding all Boeing 787s due to lithium-ion battery problems, the first general grounding since 1979. On November 7, 2018, nine days after the crash of Lion Air flight JT610, the FAA issued an EAD concerning the AoA display of the Boeing 737 MAX 8 and MAX 9. On January 6, 2024, the FAA grounded all Boeing 737 MAX 9 aircraft after Alaska Airlines Flight 1282's door plug blowout. On November 8, 2025, the FAA grounded all McDonnell Douglas MD-11 aircraft after UPS Airlines Flight 2976 suffered an engine separation; on November 14, 2025, the grounding expanded to all McDonnell Douglas DC-10. On November 28, 2025, EASA issued an EAD regarding elevator aileron computers on the Airbus A320 family, ordering modification and replacement before continued flights, during the investigation into JetBlue Flight 1230.

Reader's Guide

Emergency airworthiness directives represent a critical regulatory tool for addressing immediate safety threats. The article shows that EADs have been issued by the FAA, EASA, and other authorities following incidents ranging from engine separations and battery fires to software and sensor problems. Notable examples include the 1979 DC-10 grounding after American Airlines Flight 191, the 2013 Boeing 787 grounding after battery fires, and the 2024 Boeing 737 MAX 9 grounding after a door plug blowout. The article also documents EADs issued in response to the 2007 China Airlines 737-800 fire, the 2008 Qantas A330 pitch-down event, the 2018 Lion Air crash, and the 2025 MD-11 and DC-10 groundings. The November 28, 2025 EASA directive on Airbus A320 ELAC computers, issued during the JetBlue Flight 1230 investigation, highlights that EADs can address emerging issues like solar radiation corrupting flight control data. These directives become effective upon receipt of notification and require immediate compliance, underscoring their role in preserving airworthiness when unsafe conditions are identified.

Did You Know?

• The FAA issued its first general grounding of an aircraft model since 1979 on January 16, 2013, grounding the Boeing 787 due to lithium-ion battery problems.
• On November 28, 2025, EASA issued an EAD regarding elevator aileron computers on the Airbus A320 family, citing intense solar radiation as capable of corrupting data to flight control systems.
• On November 14, 2025, the FAA expanded a grounding from all McDonnell Douglas MD-11 aircraft to all McDonnell Douglas DC-10 aircraft after an engine separation incident.