The Air Force has released a report about a F-22 crash that killed the pilot:
Capt. Jeffey Haney had his mobility and vision restricted while flying an F-22 at 11,580 m feet and 1,925 km/h [true airspeed], at night, and then the jet cut off his oxygen supply. According to the accident report released last week, Captain Jeffrey Haney became distracted when his oxygen system stopped delivering oxygen. After initiating a descent, he allowed his F-22 to roll past inverted, unchecked. The fighter's attitude resulted in a vertical speed of 293 m/s.
According to the Air Force accident report (PDF), Haney "was recognized throughout his career for exceptional performance." On the accident flight, he was outfitted for cold weather (wore bulky clothing) and night operations (wore night vision goggles). That personal equipment would have "reduced mobility in the cockpit" and interfered with his "ability to look from side to side and down at the consoles" without bracing himself "on various areas in the cockpit." The applicable checklist for failure of the oxygen system includes activation of an emergency oxygen system. That system is actuated via a pull ring that requires 40 pounds of force to actuate and is mounted low and aft to the side of the pilot's ejection seat.
Right before the crash, Capt. Haney attempted to recover, pulling 7.4 G before slamming into the water at Mach 1.2.
The Air Force, naturally, blames the pilot, because the possibility that a $347m airplane has enormous design flaws doesn't exist in the defense appropriation universe. This continues the august tradition of military procurement that includes toy rifles that won't fire in jungles and over-reliance on GPS selective availability in UAVs.