EASA AD 2024-0059
Doors — Canopy Locking Mechanism — Modification
Summary
EASA Airworthiness Directive 2024-0059 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting Schempp-Hirth Duo Discus, Nimbus-4D, Nimbus-4DT, Nimbus-4DM, and DuoDiscus T sailplanes. The directive addresses a safety issue related to the canopy locking mechanism on these sailplanes. It mandates a modification to prevent the canopy from opening unexpectedly during flight.
What Changed
This new airworthiness directive introduces a mandatory modification of the canopy locking mechanism on specified Schempp-Hirth sailplanes. The modification follows technical notes issued by the manufacturer to correct the design flaw that could allow the canopy to open in flight due to fuselage deformation or improper locking. It requires operators to implement these changes within a specified timeframe.
Why It Matters
This directive is critical for aviation professionals because it addresses a potentially fatal safety risk where the canopy could open during flight, leading to loss of control of the sailplane. Operators and maintenance organizations must ensure compliance to maintain airworthiness and avoid accidents. Compliance teams need to track and enforce the modification to meet regulatory requirements and ensure flight safety.
What To Do
Operators of affected Schempp-Hirth Duo Discus, Nimbus-4D, Nimbus-4DT, Nimbus-4DM, and DuoDiscus T sailplanes must modify the canopy locking mechanism according to the manufacturer's technical notes within 12 months from the effective date of 19 March 2024. They should use the specified technical notes TN 380-1, TN 396-6, TN 868-4, or TN 890-5 as applicable. Requests for alternative compliance methods can be submitted to EASA if substantiated.
AI-generated summary from official EASA source document. Always verify against the original.