2026-06-03
FR doc 2026-05883 · 91 FR 14643AD 2026-06-03Published 2026-03-26Effective 2026-04-30
Supersedes 2020-14-06
Supersedence is read from the Federal Register text of the newer AD — the FAA publishes no structured field for it — and names only ADs held in our index.
Requires the same actions as AD 2020-14-06 and requires updated service material to be used for the Model DA 40 NG airplanes.
Full official abstract
The FAA is superseding Airworthiness Directive (AD) 2020-14- 06, which applied to all Diamond Aircraft Industries Inc. (DAI) Model DA 40, DA 40 F, and DA 40 NG airplanes. AD 2020-14-06 required replacing affected parts, inspecting the fuel tank chambers, and removing rubber material that has detached from the fuel tank connection hoses. AD 2020-14-06 also prohibited installing an affected part on any airplane. Since the FAA issued AD 2020-14-06, additional affected parts installed during production on Model DA 40 NG airplanes have been reported. As a result, the manufacturer has published updated service material for the Model DA 40 NG. This AD requires the same actions as AD 2020-14-06 and requires updated service material to be used for the Model DA 40 NG airplanes. The FAA is issuing this AD to address the unsafe condition on these products.