Qantas B744 near Bangkok on Oct 16th 2011, engine shut down in flight

Last Update: August 3, 2012 / 12:29:22 GMT/Zulu time

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Incident Facts

Date of incident
Oct 16, 2011

Classification
Incident

Airline
Qantas

Flight number
QF-2

Aircraft Registration
VH-OJS

Aircraft Type
Boeing 747-400

ICAO Type Designator
B744

A Qantas Boeing 747-400, registration VH-OJS performing flight QF-2 from Bangkok (Thailand) to Sydney,NS (Australia) with 356 passengers and 18 crew, was climbing out of Bangkok about 10 minutes into the flight when a loud bang was emitted by an engine (RB211) followed by vibrations. The crew shut the engine down and returned to Bangkok for a safe landing about 75 minutes later.

Passengers reported the engine emitted sparks as well.

The airline confirmed the crew shut an engine down following a bang and excessive shuddering about 10 minutes into the flight.

On Nov 23rd 2011 the NTSB reported the crew received indications of abnormal exhaust gas temperatures and vibrations in the #3 engine during the climb. The occurrence is being investigated by the ATSB.

On Aug 3rd 2012 the Australian Transportation Safety Board (ATSB) released their final report in their monthly bulletin reporting that the aircraft was climbing through 13,000 feet about 8 minutes into the flight when the #3 engine emitted a loud bang and vibrations, the crew observed abnormal engine indications thereafter. Fumes were observed in the cabin for several minutes. The crew shut the engine down and returned to Bangkok for a safe landing.

A borescopis inspection revealed a single stage 7 intermediate compressor blade had separated from its slot. The remaining intermediate compressor blades and surrounding components showed damage. Evidence of a small localised Titanium fire was found indicating the released blade had been jammed between the stage 7 IPC rotors and stators.

The engine had been last overhauled in September 2007 and had accumulated 19,615 hours in 1,988 cycles since.

The analysis of why the blade was released is still being investigated by the engine manufacturer. It had been the 7th IPC blade release event in 40 million engine hours, only 2 of the events resulted in conclusions to the cause.
Incident Facts

Date of incident
Oct 16, 2011

Classification
Incident

Airline
Qantas

Flight number
QF-2

Aircraft Registration
VH-OJS

Aircraft Type
Boeing 747-400

ICAO Type Designator
B744

This article is published under license from Avherald.com. © of text by Avherald.com.
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