Examination of failed Integrated Nozzle Assembly and Thrust Reverser components


(RB211-524 Turbofan Engine)

Examination brief

During the landing at Johannesburg International Airport on 15 March 2003, the flight crew of the Boeing 747-400 aircraft, registered VH-OJO, noted an "ENG 2 REVERSER" message displayed on the engine indication and condition alerting system (EICAS) after the application of reverse thrust. Airport personnel subsequently found debris on the runway and taxiway used by the aircraft.

An engineering examination of the number-2 engine nacelle by the operator's ground staff established that both panels from the integrated nozzle assembly (INA) drive fairing had been lost, as well as two thrust reverser blocker doors, with a third door substantially damaged. The core assembly of the engine (an RB211-524G/T model) was not damaged.

The operator reported the incident to the South African Civil Aviation Authority, who took the liberated debris into their possession for an engineering investigation of the failures. The components were subsequently sent to the Australian Transport Safety Bureau (ATSB) for further study and engineering analysis. The ATSB commenced a technical analysis investigation into the failure of the components on 1 July 2003. This report presents the findings of the ATSB analysis and conclusions drawn as to the mechanism of failure.

Publication date: 15 March 2003
Related: General Aviation
Last update 07 April 2014
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