"The US Navy and industry will pursue a next-generation on board oxygen generator system (OBOGS) while the service implements fixes to mitigate persistent oxygen and pressurization issues on its Boeing/BAE Systems T-45 trainers and Boeing F/A-18E/F Super Hornets....
...In parallel with ongoing mitigation efforts, industry will install breathing air pressure warning for aircraft fitted with the solid state oxygen monitor (CRU-123) this month and develop a next-generation OBOGS known as GGU-25.
T-45’s current OBOGS is made up of Cobham’s oxygen concentrator (GGU-7), an oxygen monitor (CRU-99) and an aircrew-worn breathing air regulator (CRU- 103).
The CRU-123 is a digital upgrade to the current CRU-99 and will be able to deliver information on both temperature and oxygen pressure to pilots, Moran says. Cobham is looking at the redesigned OBOGS as a potential replacement for the legacy system if the navy’s mitigation efforts do not work, he adds. The effort also includes adding a larger capacity emergency oxygen system on the T-45 to eliminate the current way the navy uses on board oxygen today....
...Meanwhile, the Navy is sharing its findings on hypoxia issues with the US Air Force, which recently experienced oxygen problems on Lockheed Martin F-35As at Luke Air Force Base, Arizona. The Defense Department has asked the navy for information on the hypoxia study and will determine whether the F-35 effort should merit an independent or can follow on the navy’s effort, Moran says."
https://www.flightglobal.com/news/ar...or-t-4-438277/