The disaster that taught us to fly safely: 45 years after Flight 1866
Great (and long) article in the Juneau Empire about the doomed AS1866, which slammed into a mountain outside JNU in 1971 thanks to what appeared to be the failure of an FAA navigational aid. The disaster spurred many of the safety improvements (I.e. RNP) we now have at JNU and other airports served by AS.
http://m.juneauempire.com/state/2016-09-03/disaster-taught-us-fly-safely-45-years-after-flight-1866#gsc.tab=0