Superseded. This AD was superseded by AD 2026-12-03. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2025-06-04
Effective 05/09/2025 · Published 04/04/2025
Airworthiness Directives; Airbus Helicopters
Summary
The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters (Airbus) Model AS350B, AS350B1, AS350B2, AS350B3, AS350BA, AS350D, AS355E, AS355F, AS355F1, AS355F2, AS355N, AS355NP, EC130B4, and EC130T2 helicopters. This AD was prompted by a manufacturer assessment that determined additional actions are necessary to improve particle detection for main gearboxes (MGBs) with certain planet gear beari…