AD/JBK 117/35 - Locked Cyclic Stick

This Airworthiness Directive requires operators of listed Kawasaki BK117 variants to perform the corrective actions set out in Japan Civil Aviation Bureau AD No. TCD‑7479‑2009; compliance is required within three months and the directive became effective 9 December 2010 (Applicability, Requirement, Compliance). The stated purpose is to prevent inadvertent take-off with a locked cyclic stick that could cause loss of control; operators pay for inspections/repairs, CASA (via its delegate) enforces compliance, and affected operators must change maintenance or pre‑flight procedures (Background, Requirement).