Summary
The FAA proposes to adopt a new airworthiness directive (AD) for certain McDonnell Douglas Model 717-200 airplanes. This proposed AD would require repetitively replacing and testing a certain relay of the passenger oxygen release system in the forward cabin. This proposed AD is prompted by reports of a failed relay of the passenger oxygen release system. We are proposing this AD to prevent failure of the relay, which could result in the oxygen masks failing to deploy and deliver oxygen to the passengers in the event of a rapid decompression or cabin depressurization.