Casualties unknown

1990-12-20: Boeing 727-22 (N40486) — Continental Airlines — Denver, CO

Denver, CO, US

On December 20, 1990, a Boeing 727-22 (registration N40486) operated by Continental Airlines was involved in an aviation accident near Denver, CO. Investigators recorded the probable cause as: Bearing failure due to a crack in the number six bearing outer race. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 16 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards
Boeing 727-22
Photo: Pete Macklin / CC BY-SA 2.0, via Wikimedia Commons

An aircraft's number one engine failed while climbing through 800 feet after takeoff. The captain shut down the engine and continued to Denver, landing safely. Investigation found a bearing failure.

Incident Overview

An incident occurred shortly after takeoff when the number one engine of the aircraft failed while it was climbing through an altitude of 800 feet above ground level. The captain responded by shutting down the affected engine and making a decision to continue the flight to Denver. The remainder of the flight was without incident, and the aircraft landed at Denver without further issues.

Investigation Findings

Following the flight, the engine was disassembled and subjected to a detailed examination. The investigation revealed that the engine failure was caused by a bearing failure, specifically a crack in the outer race of the number six bearing. No evidence of turbine failure was found during the examination. Additionally, it was observed that uncontained penetration had occurred in the engine casing at three positions: the 2:30, 5:30, and 6:30 clock positions.

Probable cause

Bearing failure due to a crack in the number six bearing outer race.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X24753. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.