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Proposed ruleComments close Dec. 28, 2026

Airworthiness Directives; Diamond Aircraft Industries GmbH Airplanes

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register Nov. 12, 2026. Document 2026-23068. Updated Nov. 12, 2026.

Open for public comment until Dec. 28, 2026. Comment on Regulations.gov

What it does

The FAA proposes to adopt a new airworthiness directive (AD) for all Diamond Aircraft Industries GmbH (DAI) Model DA 50 C airplanes. This proposed AD was prompted by reports of flap actuator failures. This proposed AD would require inspecting for displacement of the black slide grommet and inspecting the rod end bearing for a tight fit of the flap actuator. This proposed AD would also require modification of the flap actuator followed by repetitive inspections for a broken actuator torque seal on the jam nuts at the attachment of the rod end bearing of the flap actuator with applicable corrective action. This proposed AD would also prohibit the installation of unmodified flap actuators on any airplane. The FAA is proposing this AD to address the unsafe condition on these products.

The Federal Aviation Administration's summary, as published in the Federal Register.

What it would change

1 part of Title 14 of the Code of Federal Regulations:

14 CFR 39

What happens next and when

The FAA must receive comments on this NPRM by December 28, 2026.

The agency's dates, word for word.

Document number2026-23068
ActionNotice of proposed rulemaking (NPRM).
AgenciesTransportation Department; Federal Aviation Administration
PublishedNov. 12, 2026
Comments closeDec. 28, 2026
Regulation identifier (RIN)2120-AA64
DocketFAA-2026-13809

Source: the Federal Register (public domain). The document in the Federal Register