Summary
The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD- 500-1A11 airplanes. This proposed AD was prompted by a design review that identified the fixed emergency locator transmitter (ELT) lithium batteries would not be sufficiently cooled by the outside air in the event of a thermal runaway event. This proposed AD would require replacing the ELT with a new ELT with redesigned batteries, as specified in a Transport Canada AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products.