"After losing cabin pressurization, the Learjet’s pilots became incapacitated because they failed to receive sufficient supplemental oxygen."
The NTSB established flight-crew incapacitation following a loss of cabin pressurization and inadequate oxygen supply as the probable cause of the accident. Investigators could not determine precisely why the crew failed to receive sufficient oxygen. The case demonstrates how a system can continue performing its programmed function after its human operators become unable to intervene.
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