EASA Regulations for Airbus Helicopters MBB-BK117 D3

EASA AD 2021-0289-E

Rotorcraft Flight Manual / Section 2 and 3 — Amendment

EASA Airworthiness Directive 2021-0289-E is an emergency directive addressing Airbus Helicopters Deutschland GmbH MBB-BK117 C-2, D-2, D3, and D-3m helicopters of all variants and serial numbers. It mandates amendments to the Rotorcraft Flight Manual (RFM) Sections 2 and 3 to incorporate temporary revisions related to the inlet barrier filter (IBF) system. The directive aims to mitigate engine flame out risks caused by partial icing of the IBF engine intakes during operations in falling snow.