This document publishes in the Federal Register an amendment adopting airworthiness
directive (AD) 2011-04-09 that was sent previously by individual notices to the known U.S. owners
and operators of affected airplanes identified above. This AD requires modifying the chemical
oxygen generators in the lavatory. This AD was prompted by reports that the current design of these
oxygen generators presents a hazard that could jeopardize flight safety. We are issuing this AD to
eliminate this hazard.
FAA-2011-0157 Various Transport Category Airplanes Equipped With Chemical Oxygen Generators Installed in a Lavatory
By John Bagnas
