Incident Overview
Date: Friday 20 January 1989
Aircraft Type: Boeing 737-201
Owner/operator: Piedmont Airlines
Registration Number: N242US
Location: Chicago-O’Hare International Airport, IL (ORD) –
ÿ United States of America
Phase of Flight: Take off
Status: Substantial, repaired
Casualties: Fatalities: 0 / Occupants: 33
Component Affected: Aft cone (engine mounting) boltAft cone (engine mounting) bolt
Investigating Agency: NTSBNTSB
Category: Accident
An aircraft took off from runway 27L and experienced a catastrophic engine separation, resulting in a rapid descent and impact. The crew successfully initiated a return to the airport for a safe emergency landing.An aircraft took off from runway 27L and experienced a catastrophic engine separation, resulting in a rapid descent and impact. The crew successfully initiated a return to the airport for a safe emergency landing.
Description
The aircraft was taking off from runway 27L when the no. 2 engine separated. It fell to the ground 800 feet past the end of the runway. The crew managed to climb to 1000 feet before they initiated a return to the airport for a safe emergency landing on runway 04R. PROBABLE CAUSE: “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.”
Primary Cause
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.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.Share on:
