Irvine, Calif.-based Eaton Corp. (Booth No. 5967) recently celebrated the successful flight testing of its arc fault circuit breaker (AFCB) technology as a stand-alone replacement for existing circuit breakers. Completing more than 350 normal service flights aboard a U.S.
Cessna 525B CitationJet CJ3, Stuart, Fla., March 8, 2008–The NTSB blamed the crew’s failure to reset the brake circuit breaker before taxiing for the airplane’s collision with an unoccupied parked airplane when the brakes didn’t work. The first officer had pulled the brake circuit breaker two days earlier when updating the Jeppesen database to keep the brake hydraulic motor from continuously cycling.
A newly designed circuit board is now available for Citation 525 and a few Citation 560 operators that have been required since late last year to disengage their pitch trim and autopilot servo circuit breakers to prevent a possible runaway trim. The FAA has proposed mandatory replacement of the breakers, installation of which is covered under warranty for the Model 525.
A proposed AD calls for inspections to detect improperly installed wiring for optional cabin lighting that could cause fires in Falcon 50s. The FAA, which cited no incidents attributed to the alleged problem, said the wiring may be directly connected to the battery bus instead of through a dedicated circuit breaker.
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