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.
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We must receive comments on this AD by April 22, 2011.
It looks like they are removing them to reduce the risk of someone converting the oxygen into an explosive. I noticed this AD while researching the portable electronic device controversy. Strangely, I have not yet found any humorous comments about explosive lavatories or a need for oxygen generation while in the lavatory.