A US Air Force F-22 Raptor assigned the to Hawaii Air National Guard's 199th Fighter Squadron made an emergency landing on 31 July, but the incident is not related to a series "hypoxia-like" incidents that has plagued the Lockheed Martin-built jet.
"Yesterday's IFE [in-flight emergency] was unrelated to the oxygen system," the USAF says. "There was an indication of a possible problem with the front landing gear. The aircraft landed without incident and was being looked at."
The 199th Fighter Squadron and its active-duty associate 19th Fighter Squadron will eventually operate 20 of the fifth-generation stealth fighters. Safety restrictions currently in place regarding how far the F-22 can operate from an airfield has temporarily curtailed delivery of the remaining aircraft to the Hawaii-based unit.