The United States Federal Aviation Administration (FAA) has
received reports of protective covers installed over the percussion
cap or a silicon tube installed over the end of the trigger
mechanism pin, on the oxygen generator, rendering the emergency
oxygen system inoperative.
A Cirrus SR22 has gone down in Northern Wisconsin, killing it's
pilot and injuring the University of North Dakota flight instructor
who was reportedly providing dual instruction. Local sources
responding to ANN's inquiries, indicate that conditions were 'nice'
VFR, and that the aircraft may have collided with terrain (trees)
prior to a landing.