Boeing 747-251F N619US

Summary

On 28 November 1985 at about 16:45 local time, a Boeing 747-251F registered N619US was involved in an incident near Glen Ellyn, Illinois, United States. 3 people were on board and nobody was injured. The aircraft was slightly damaged. No probable cause statement is available for this record.

Date

28 November 1985 at 16:45

Classification

Incident

Location

Glen Ellyn, Illinois, United States

Coordinates

41.8603, -88.0593

Aircraft

Boeing 747-251F

Registration

N619US

Category

Airplane

Engines

4

Operator

Not recorded

Operating rule

Part 121: Air Carrier

Purpose of flight

Unknown

Phase of flight

Not recorded

Route

Chicago → Minneapolis

Aircraft damage

Minor

Weather

IMC

Light

Day

NTSB number

CHI86IA034

Nobody was injured.

The NTSB has not published a probable cause for this record. No probable cause statement is present in the source data.

Nothing about the cause is stated here that is not in the source record.

Read the full NTSB narrative

DURING CLIMB A BANG WAS HEARD AND THE AIRCRAFT SHUDDERED. THE CREW STATED THAT THE NUMBER THREE ENGINE OIL PRESSURE AND OIL QUANTITY INDICATED LOW. THE FIRE WARNING LIGHT AND BELL ACTIVVATED. THE ENGINE WAS SHUT DOWN AND THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. POSTFLIGHT INSPECTION REVEALED THE OUTBOARD COWLING OF THE NUMBER THREE ENGINE HAD SEPARATED. THE COWLING WAS FOUND IN A SUBURB TEN MILES SOUTHWEST OF THE AIRPORT. ENGINE TEARDOWN REVEALED A CRACK IN A VENT LINE STRUT IN THE DIFFUSER AREA ALLOWING BLEED AIR TO IGNITE OIL IN THE NUMBER THREE BEARING AREA. PRESSURE FORCED THE FIRE TO VENT THROUGH THE COMPARTMENT BREATHER AIR TUBE DISINTEGRATING THE MAIN BEARING BREATHER TUGE ELBOW. THE FORCE OF THE EXPLOSION AT THE DISINTEGRATING ELBOW BLEW THE OUTBOARD COWLING OFF.

Quoted verbatim from the NTSB record.