Incident Overview
Date: Thursday 20 December 1956
Aircraft Type: Lockheed 18-56-23 Lodestar
Owner/operator: United States Steel Corporation
Registration Number: N1245V
Location: 8 km N of Tyrone, PA –
ÿ United States of America
Phase of Flight: En route
Status: Destroyed, written off
Casualties: Fatalities: 3 / Occupants: 3
Component Affected: Aircraft structural integrity.Aircraft structural integrity.
Investigating Agency: CABCAB
Category: Accident
An aircraft lost control during a cruising altitude of 9000 feet, resulting in a rapid descent and subsequent structural failure. The incident was attributed to an unforeseen loss of control leading to a rapid descent.An aircraft lost control during a cruising altitude of 9000 feet, resulting in a rapid descent and subsequent structural failure. The incident was attributed to an unforeseen loss of control leading to a rapid descent.
Description
Lost control while at cruising altitude of 9000 feet. During the uncontrolled descent the aircraft failed structurally as a result of airloads in excess of design strength. PROBABLE CAUSE: “The Board determines that the probable cause of the accident was the loss of control for reasons unknown resulting in a rapid descent during which structural failure occurred.”
Primary Cause
Loss of control due to airloads exceeding design strength.Loss of control due to airloads exceeding design strength.Share on:
