AircraftDirectives
MembershipSign inCreate free account
Menu
Airworthiness Directive

AD 2026-15-08 91 FR 47940 Active

Federal Aviation Administration · 14 CFR part 39

Requires repetitive visual checks of the fuel system for fuel leakage, and replacement of the affected copper sealing ring.

Federal Register (opens in a new tab)FAA DRS (opens in a new tab)

FR document
2026-15466
Amendment
39-23420
Published
2026-07-30
Effective
2026-09-03
Models covered
1

Last live check: 2026-08-19

Printed from https://aircraftdirectives.com/ad/2026-15-08 · 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.

Opens your browser's print dialog. Choose “Save as PDF” to export a file. Keyboard: Ctrl+P or Cmd+P.

AD

2026-15-08

FR doc 2026-15466 · 91 FR 47940

AD 2026-15-08Published 2026-07-30Effective 2026-09-03

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 repetitive visual checks of the fuel system for fuel leakage, and replacement of the affected copper sealing ring.

Full official abstract

The FAA is adopting a new airworthiness directive (AD) for all Stemme GmbH (Stemme) Model Stemme S 12 gliders. This AD was prompted by reports of fuel leaking around certain copper sealing rings within the fuel system. This AD requires repetitive visual checks of the fuel system for fuel leakage, and replacement of the affected copper sealing ring. This AD also prohibits the installation of affected parts. The FAA is issuing this AD to address the unsafe condition on these products.

More directives for Stemme S10/S12

  1. AD 2026-15-04 Airworthiness Directives; Stemme GmbH Gliders Effective 2026-07-24
  2. AD 2023-02-03 Airworthiness Directives; Stemme AG Gliders Effective 2023-03-01
  3. AD 2022-14-11 Airworthiness Directives; Stemme AG (Type Certificate Previously Held by... Effective 2022-07-26
  4. AD 2022-03-07 Airworthiness Directives; Stemme AG Gliders Effective 2022-03-02
  5. AD 2021-26-12 Airworthiness Directives; Stemme AG Gliders Effective 2022-02-24

All Stemme S10/S12 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