EASA SIB CE-15-22
Beechcraft 33, 35, 36, 55 and 58 Aeroplanes - Wing Leading Edge Hinge-Pin Corrosion
Summary
The Special Airworthiness Information Bulletin SAIB: CE-15-22 is an FAA informational bulletin addressing potential corrosion on the wing leading edge hinge-pin of Beechcraft 33, 35, 36, 55, and 58 series airplanes, including Debonair, Bonanza, and Baron models. The corrosion is linked to deicing fluid accumulation and affects specific models such as the 35-33, G36, B55, and others. This bulletin does not mandate regulatory action but raises awareness of the issue.
What Changed
SAIB CE-15-22 introduces awareness of corrosion issues on the wing leading edge hinge-pin area in certain Beechcraft aircraft, based on reports of corrosion in multiple airplanes. It clarifies that the condition is not currently considered unsafe enough to warrant an Airworthiness Directive under 14 CFR part 39 but recommends inspections during routine maintenance.
Why It Matters
This bulletin is important for aviation professionals because corrosion in the hinge-pin area can compromise structural integrity if left unchecked. Operators and maintenance personnel need to be vigilant during inspections to detect early signs of corrosion, ensuring continued airworthiness and safety. It helps MROs prioritize inspection areas and communicate with manufacturers if corrosion is found.
What To Do
Operators of affected Beechcraft Debonair, Bonanza, and Baron series airplanes should inspect the front spar leading edge lower hinge-pin area for corrosion during their annual inspections, especially when under wing access panels are removed. If corrosion is detected, they should contact Beechcraft Customer Support for further guidance. No specific compliance deadline is mandated, but inspections are recommended during regularly scheduled yearly maintenance.