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Airworthiness Directive

AD 2021-26-25 87 FR 3032 Active

Federal Aviation Administration · 14 CFR part 39

Requires replacing certain air brake end stop bushings, inspecting certain other air brake end stops, and repairing if necessary.

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FR document
2022-00973
Amendment
39-21884
Published
2022-01-20
Effective
2022-02-24
Models covered
1

Last live check: 2026-08-19

Printed from https://aircraftdirectives.com/ad/2021-26-25 · AircraftDirectives restates official FAA and manufacturer records; the official sources named on this sheet control. Not an airworthiness determination.

This page is a reference Record, not an airworthiness or compliance determination. Official FAA and manufacturer sources control over our restatement, subject to governing law. Check applicability, current requirements and incorporated documents before acting. The owner or operator remains responsible for airworthiness and required records under 14 CFR 91.403 and 91.417, as applicable. Terms of Use: /terms.

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AD

2021-26-25

FR doc 2022-00973 · 87 FR 3032

AD 2021-26-25Published 2022-01-20Effective 2022-02-24

FAA rule - 14 CFR 39

FAA rule. Compliance with an applicable AD is required under 14 CFR 39.7. Check its effective date, applicability, compliance times and current status.

Requires replacing certain air brake end stop bushings, inspecting certain other air brake end stops, and repairing if necessary.

Full official abstract

The FAA is adopting a new airworthiness directive (AD) for certain Schempp-Hirth Flugzeugbau GmbH Model Duo Discus and Duo Discus T gliders. This AD was prompted by mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as jerky extension of the air brakes at very high air speeds, including cases where the air brake blades interlock. This AD requires replacing certain air brake end stop bushings, inspecting certain other air brake end stops, and repairing if necessary. The FAA is issuing this AD to address the unsafe condition on these products.

More directives for Schempp-Hirth

  1. AD 2026-03-04 Airworthiness Directives; Schempp-Hirth Flugzeugbau GmbH Gliders Effective 2026-04-09
  2. AD 2025-04-14 Airworthiness Directives; Schempp-Hirth Flugzeugbau GmbH Gliders Effective 2025-04-08
  3. AD 2023-17-05 Airworthiness Directives; Schempp-Hirth Flugzeugbau GmbH Gliders Effective 2023-10-12
  4. AD 2023-03-14 Airworthiness Directives; Schempp-Hirth Flugzeugbau GmbH Gliders Effective 2023-04-05
  5. AD 2023-03-22 Airworthiness Directives; DG Flugzeugbau GmbH and Schempp-Hirth Flugzeug... Effective 2023-04-05

All Schempp-Hirth directives

View on Federal Register (opens in a new tab) View this AD in FAA DRS (opens in a new tab) Print AD packet (opens the full Federal Register document in a new tab)

Applies to 1 model in our index