Aviation Accident Summary CHI89MA046

CHICAGO, IL, USA

Aircraft #1

N242US

BOEING 737-201

Probable Cause and Findings

PREVIOUS DAMAGE TO THE AFT CONE (ENGINE MOUNTING) BOLT, WHICH RESULTED IN MISMATCHED SURFACES BETWEEN THE BOLT AND ISOLATION MOUNT, LOSS OF TORQUE DURING CYCLIC LOADING OF THE MOUNTING BOLT, AND SUBSEQUENT FATIGUE FAILURE OF THE BOLT.

 

Source: NTSB Aviation Accident Database

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