Navy Rules Out Suspected Physiological Episodes Cause While Super Hornet Rates Grow in 2019

CAPITOL HILL ? The Navy has ruled out breathing air contamination as a cause of physiological episodes, but a complex set of conditions ? including both cabin pressure issues and human factors ? has led to the rates of pilots experiencing PEs this current fiscal year being back on the rise.

Though the service has not yet pinpointed a cause ? and likely won?t ever find a single root cause ? other gases or contaminants have not been found in breathing air coming from the jets? Onboard Oxygen Generation System (OBOGS), the Navy said in a little-publicized news release this week.


T-6 hypoxia problem solved, Air Force announces

The rash of hypoxia-like problems in the Air Force?s fleet of T-6 Texan II trainers was primarily caused by fluctuating concentrations of oxygen in the cockpit, the service said Thursday.

Air Education and Training Command said in a release that the Air Force will start putting a series of fixes in place to correct the problems. These fixes will include redesigning the oxygen system in the T-6, adjusting oxygen levels in flight, and increasing maintenance on the On-Board Oxygen Generating System, or OBOGS.

A six-month study conducted by AETC and Air Force Materiel Command, uncovered the problem with varying oxygen concentration levels, which AETC described as the ?major factor in unexplained physiological events? affecting T-6 pilots, AETC said. Experts from the Navy and NASA also assisted with the study.