NPRM FAA-2026-13809

Comments due Dec 28

Proposed airworthiness directive · Diamond Aircraft Industries DA 50 C

Published
November 12, 2026 · 91 FR 72819
Comments due
December 28, 2026
Action
Notice of proposed rulemaking (NPRM)
Docket
FAA-2026-13809
Project
MCAI-2026-00761-A
FR document
2026-23068
Products
Aircraft
Models
DA 50 C

A proposal is not in force. If adopted, it becomes an AD, usually with changes. Only the Federal Register edition is official.

Summary

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.

Service documents this proposal cites · 1

Manufacturers’ service documents named in its text, as OpenAirDocs read them: check each against the text. “Copy” marks those OpenAirDocs holds.

Query with SQL
duckdb -csv -c "SELECT d.issuer, d.type_label, d.number, c.revision, c.revision_date, c.cited_as, c.incorporated_by_reference, c.in_regulatory_text,
    'https://openairdocs.org/service-documents/' || d.document_id AS page_url
  FROM 'https://openairdocs.org/data/latest/service_document_citation.parquet' c JOIN 'https://openairdocs.org/data/latest/service_document.parquet' d USING (document_id)
  WHERE c.record_type = 'faa_proposed_directive' AND c.record_id IN ('FR:2026-23068') AND d.issuer_kind <> 'authority'
  QUALIFY row_number() OVER (PARTITION BY c.document_id, c.revision_key ORDER BY c.record_date DESC) = 1
  ORDER BY c.incorporated_by_reference DESC, c.in_regulatory_text DESC, d.document_id, c.revision_key"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

Docket FAA-2026-13809 · 0

OpenAirDocs hasn’t listed this docket’s documents yet. See it on regulations.gov.

Notices in this docket · 1