OBOGS strikes again. F/A-18, T-45, F-22, and now the F-35. Time to revisit this entire system.
Yep, sounds like it. Maybe they should just revert to oxygen bottles until they can fix the oxygen generators. A decent-sized bottle will supply oxygen for several hours. I think the main reason for the switch was to have an unlimited O2 supply, but this issue is getting ridiculous.