U.S. FEDRegulation
FAA issues airworthiness directive for Airbus MBB-BK 117 C-1 helicopters over louver box
The Federal Aviation Administration adopted a new airworthiness directive covering all Airbus Helicopters Deutschland Model MBB-BK 117 C-1 helicopters. The directive followed a report that a louver box assembly detached in flight because of incorrect installation. It requires repetitive play checks of the louver box assembly and corrective action based on the results. It takes effect October 26, 2026.
Key points
- Applies to all Airbus Helicopters Deutschland Model MBB-BK 117 C-1 helicopters.Federal Register
- Prompted by report of a louver box assembly detaching in flight.Federal Register
- Incorrect installation identified as the cause of the detachment.Federal Register
- Requires repetitive play checks and corrective action when findings warrant.Federal Register
- Effective October 26, 2026; published as 91 FR 64606.Federal Register
- Amends 14 CFR part 39 (FR Doc. 2026-20722); issued as a final rule with a request for comments.Federal Register
Sources1 article across 1 outlet
Filed under
RegulationU.S.FAA Airworthiness Directive: Airbus MBB-BK 117 C-1 Louver Box Assembly (2026)RegulatoryFor practitionersFor governance