posted on Sep, 29 2017 @ 10:12 PM
The Navy is continuing sieve bed testing, but has yet to identify a contamination issue that is high enough to cause a problem. The first students
are flying again, but they're only allowed to fly on aircraft that have the CRU-123 digital upgrade to the CRU-99 and water separator installed. The
CRU-123 monitors oxygen pressure and temperature, and records it for later analysis. So far, 115 of 170 active aircraft have it installed, and it will
be installed on all aircraft by the end of the second quarter of 2018. The water separator has been installed on 146 of the 197 total aircraft that
are in the fleet (the 196 includes test airframes, and aircraft that are currently non-flyable.
Since August, there have been 4 PEs reported. Interestingly, only one of the two pilots was affected. The CRU-123 reported oxygen levels and
pressure at normal levels. That points to a physical factor with the pilots, instead of a system issue, at least in these events.