EASA AD 26-117 — Fuel – Hoses – Inspection / Replacement

Summary

EASA Airworthiness Directive Proposal 26-117 is a regulatory document addressing fuel hose inspection and replacement for DG Aviation GmbH DG-500 M, DG-500 MB, and DG-800 B powered sailplanes. It targets the 40mm fuel hose fixed to the primer valve, requiring inspection and replacement to prevent fuel leakage and potential fire risk. This directive applies to all serial numbers except DG-800 B sailplanes modified per DG Flugzeugbau GmbH Technical Note 800/41 Instruction 4.

What Changed

This new proposed Airworthiness Directive introduces mandatory one-time inspection and replacement requirements for the affected 40mm fuel hose on specified DG Aviation powered sailplanes. It requires inspection within 30 days of the AD's effective date and replacement of any damaged hoses with fire-resistant parts equipped with metal hose connectors within specified timeframes. The directive also permits pilot-owners to perform the inspections under certain regulatory provisions.

Why It Matters

This directive is critical for aviation professionals as it addresses a safety issue involving fuel hose rupture that could lead to engine power loss and fire risk during self-launch operations. Operators and maintenance organizations must ensure compliance to maintain aircraft airworthiness and prevent hazardous incidents. Compliance teams need to track inspection and replacement deadlines to avoid regulatory violations and ensure continued safe operation of affected sailplanes.

What To Do

Operators of DG-500 M, DG-500 MB, and DG-800 B powered sailplanes must inspect the affected fuel hose within 30 days of the AD's effective date following DG Aviation Technical Notes TN800-54 and TN500-18. Any cracked or damaged hoses must be replaced with serviceable, fire-resistant hoses equipped with metal connectors before the next engine use or within 30 days. If no damage is found, replacement must still occur within three months. Installation of affected parts is only allowed if they meet the serviceable criteria.