Tesla: Failure of the FSD's degradation detection system [pdf]

NHTSA investigation (EA26002) into Tesla's Full Self-Driving system failing to detect its own performance degradation — a safety-critical meta-failure where the watchdog system itself broke down. The document originates from NHTSA's Office of Defects Investigation, signaling formal regulatory scrutiny rather than an internal audit. Significant for autonomous vehicle safety policy and the broader question of AI systems reliably monitoring their own reliability.