Archives For rotor burst

20110122-093121

Why we may be carrying an order of magnitude greater risk from aircraft engine rotor bursts than we thought

One of the ‘implicit’ conclusions of the 2010 AIA study on the threat posed by jet engine rotor bursts was that the fleet of modern aircraft designed to meet FAA circular AC 20-128A also met the FAA established safety targets of a 1 in 20 likelihood of a catastrophic loss, in the event of a engine rotor burst.

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On June 2, 2006, an American Airlines B767-223(ER), N330AA, equipped with General Electric (GE) CF6-80A engines experienced an uncontained failure of the high pressure turbine (HPT) stage 1 disk2 in the No. 1 (left) engine during a high-power ground run for maintenance at Los Angeles International Airport (LAX), Los Angeles, California.

To provide a better appreciation of aircraft level effects I’ve taken the NTBS summary description of the damage sustained by the aircraft and illustrated it with pictures taken of the accident by bystanders and technical staff.

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It appears that the underlying certification basis for aircraft safety in the event of a intermediate power turbine rotor bursts is not supported by the rotor failure seen on QF 32.

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