SAN FRANCISCO, CA, USA
N1833U
DOUGLAS DC10-10
DURING THE INITIAL PUSHBACK FROM THE GATE PRIOR TO ENG START A LOUD NOISE WAS HEARD & THE ACFT NOSE SLOWLY SETTLED ONTO THE TUG THAT WAS PERFORMING THE PUSHBACK. THE CAPTAIN ORDERED THE ACFT EVACUATED USING THE EMERGENCY SLIDES. THE UPPER JAW OF THE TOWBAR HAD FAILED DUE TO EXTENSIVE STRESS-CORROSION CRACKING. THIS FAILURE RESULTED IN THE TOWBAR IMPACTING THE NOSE LANDING GEAR CAUSING A FAILURE OF THE NOSE GEAR LOWER DRAG LINK UPPER CLEVIS. THE NOSE GEAR THEN COLLAPSED & THE ACFT SETTLED ONTO THE TUG.
Source: NTSB Aviation Accident Database
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