Event Details

Title:Engine failure, Air France, Boeing 747-128, F-BPVD, St. Jean, P.Q., Canada, August 17, 1970
Micro summary:This Boeing 747-128 experienced an uncontained engine failure during climb, resulting in a diversion.
Event Time:1970-08-17 at 2235 EDT
File Name:1970-08-17-US.pdf
Publishing Agency:National Transportation Safety Board (NTSB)
Publishing Country:USA
Report number:NTSB-AAR-1970-10-7
Site of event:Climb, 5600', over St. Jean VOR
Departure:Pierre Elliott Trudeau International (Dorval) Airport, Montreal, Canada
Destination:Orly Airport, Paris, France
Airplane Type(s):Boeing 747-128
Flight Phase:Climb
Operator(s):Air France
Type of flight:Revenue
Serious Injuries:0
Other Injuries:0
Executive Summary:Air France Flight 030, a Boeing 747-128, F-BPVD, was a scheduled passenger flight which originated at Chicago's O'Hare International Airport at 1820 EDT, on August 17, 1970. Its destination was Orly Airport, Paris, France, with an intermediate scheduled stop at Montreal, P.Q., Canada. At departure from Montreal, 174 revenue passengers, two infants, and a crew of 17 were aboard the flight.

The flight from Chicago to Montreal was normal in every respect. The takeoff from Montreal at 2226 was routine; however, approximately 9 minutes after takeoff, at 2235 at an altitude of 5,600 feet m.s.I., a separation of the second-stage turbine disk rim of the No. 3 engine occurred, and pieces penetrated and ruptured the high-pressure turbine case and associated engine cowling. The separation of the turbine disk rim resulted in a localized fire in the upper forward portions of No. 3 engine.

A fire warning, which came on simultaneously with the turbine failure, terminated after both containers of fire extinguishing agent were discharged. The No. 3 engine was shut down and the flight diverted to John F. Kennedy International Airport, New York, where it landed safely at 0004 (August 18). There were no injuries to passengers, crew, or persons on the ground.

The Board determines that the probable cause of this incident was the in-flight separation of the second-stage turbine disk rim of the No. 3 engine. The separation of the disk rim was the result of incorrect assembly of the high-pressure turbine module.

The Safety Board, sent a letter to the Administrator of the Federal Aviation Administration (FAA) on August 21, 1970. This letter made recommendations relating to detection of dimensional discrepancies in the turbine module of the JT9D engine and immediate removal from service of any JT9D engines disclosing any dimensional discrepancies. The FAA took corrective actions essentially as recommended by the Board.
Learning Keywords:Systems - Engine - Contained Engine Failure
Systems - Engine Fire
Other - Manufacturing Issues


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