EASA Regulations for De Havilland Canada DHC-8 Series 300

EASA SIB AV-2009-02

DHC-8 Series 100/200/300 Nacelle Bolt Migration

Transport Canada Advisory AV-2009-02 is a Service Difficulty Advisory addressing nacelle bolt migration issues on De Havilland Canada DHC-8 Series 100, 200, and 300 aircraft. The advisory highlights problems with incorrectly installed oversized washers (P/N CSP192-96) that prevent nacelle pins from migrating, leading to significant structural damage including buckled nacelle skin panels and cracked components. The document also references similar past events and provides detailed findings on affected parts and maintenance concerns.