EASA SIB CE-13-22
W31 series Switch Style Circuit Breakers (SSCB) manufactured by Tyco or Potter Brumfield
The FAA Special Airworthiness Information Bulletin SAIB: CE-13-22 addresses airworthiness concerns related to W31 series switch style circuit breakers (SSCB) manufactured by Tyco or Potter Brumfield. These SSCBs are installed on various Cessna models including 401, 402, 404, 411, 414, 421, 425, and 441, as well as Beechcraft models such as F33 Series, G33, V35B, A36, B36TC, and others. The bulletin highlights failure modes that can cause power loss or overheating, potentially leading to smoke or fire hazards.
Safety Information BulletinMaintenanceSafety MgmtCessna 401Cessna 402Cessna 404Cessna 411Cessna 414Cessna 421Cessna 425Cessna 441Beechcraft F33 SeriesBeechcraft G33Beechcraft V35BBeechcraft A36Beechcraft B36TC