A DHC-4T (N400NC) operated by NewCal Aviation loses pitch control after taking off for a test flight, crashing nose-first next to the runway. The aircraft's gust lock, which was made unnecessary due to its new turboprop engines, reportedly re-engaged due to a design flaw leading to the loss of control. All three people on board the aircraft were killed.https://aviation-safety.net/database/record.php?id=19920827-1Credit to Vientorio for the original upload to Youtube.