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Department of Transportation
Federal Aviation Administration
• 14 CFR Part 39
• [Docket No. FAA-2024-2135; Project Identifier MCAI-2024-00157-G; Amendment 39-22972; AD 2025-04-14]
• RIN 2120-AA64
AGENCY:
Federal Aviation Administration (FAA), DOT.
ACTION:
Final rule.
SUMMARY:
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 reports of gliders' canopies opening during air tow. This AD requires modifying the canopy locking mechanism. The FAA is issuing this AD to address the unsafe condition on these products.
DATES:
This AD is effective April 8, 2025.
The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of April 8, 2025.
ADDRESSES:
AD Docket:
You may examine the AD docket at
regulations.gov
under Docket No. FAA-2024-2135; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, the mandatory continuing airworthiness information (MCAI), any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Material Incorporated by Reference:
• For Schempp-Hirth Flugzeugbau GmbH material identified in this AD, contact Schempp-Hirth Flugzeugbau GmbH, Krebenstrasse 25, Kirchheim unter Teck, Germany; phone: +49 7021 7298-0; email:info@schempp-hirth.com;
website:
schempp-hirth.com.
• You may view this material at the FAA, Airworthiness Products Section, Operational Safety Branch, 901 Locust, Kansas City, MO 64106. For information on the availability of this material at the FAA, call (817) 222-5110. It is also available atregulations.gov
under Docket No. FAA-2024-2135.
FOR FURTHER INFORMATION CONTACT:
Fred Guerin, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: (206) 231-2346; email:
fred.guerin@faa.gov.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to all Schempp-Hirth Flugzeugbau GmbH Model Duo Discus and Duo Discus T gliders. The NPRM published in the
Federal Register
on August 30, 2024 (89 FR 70580). The NPRM was prompted by AD 2024-0059, dated March 5, 2024, issued by the European Union Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Union (EASA AD 2024-0059) (also referred to as the MCAI). The MCAI states that occurrences have been reported of the canopy opening during air tow on the Model Duo Discus and Nimbus gliders. The investigation concluded that the fuselage could be
( printed page 11130)
temporarily deformed due to forces related to acceleration, which allowed the locking mechanism to move into the open position. These conditi…
Fonte: Federal Register (federalregister.gov). Texto original em inglês.