Aviation safety investigations & reports

Abnormal engine indications - Number 3 engine in-flight shut down, Boeing 747-438, VH-OJS, near Suvarnabhumi Airport Bangkok, Thailand, 16 October 2011

Investigation number:
AO-2011-134
Status: Completed
Investigation completed

Summary

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This investigation report was originally released in August 2012. This revision contains an update based on additional information from the outcomes of the engine manufacturer’s internal investigation into the occurrence.

What happened

On 16 October 2011, at about 1033 Coordinated Universal Time (UTC), a Boeing 747-438 aircraft, registered VH-OJS, operated by Qantas Airways, departed Suvarnabhumi Airport, Bangkok, Thailand on a scheduled passenger flight to Sydney, Australia.
About 8 minutes into the flight, as the aircraft was climbing through 13,000 ft, the crew reported hearing a loud bang and experiencing vibrations and abnormal indications from the No. 3 engine. Fumes were also reported in the cabin for several minutes after the event.

The flight crew shutdown the engine and broadcast a ‘PAN’ before jettisoning approximately 55 tonnes of fuel and returning to Bangkok where the aircraft landed safely at 1147 UTC. The engine failure was fully contained and there were no reported injuries to passengers or crew.

 

Aviation Short Investigation Bulletin - Issue 23

Download Final Report
[Download  PDF: 222KB]
 
 
Alternate: [Download  DOCX: 279KB]
 

Original summary

Download Original Report
[Download  PDF: 3.57MB]
 

On 16 October 2011 at 1033 Coordinated Universal Time, a Boeing Company 747-438 aircraft registered VH-OJS, operated by Qantas Airways departed Suvarnabhumi Airport, Bangkok, Thailand on a scheduled passenger flight to Sydney, Australia. Shortly after takeoff, the flight crew reported hearing a loud bang and experiencing vibrations and abnormal indications from the No.3 engine. The flight crew shut the engine down and declared a PAN before returning the aircraft safely to Bangkok.

Disassembly and inspection of the engine revealed that the engine failure was as a result of the release of a single, stage 7, intermediate pressure compressor blade from the compressor disc slot. The factors contributing to the blade release are the subject of an ongoing investigation by the engine manufacturer. If further information becomes available relating to the engine failure, the ATSB will update this report.

Download Original Report
[Download  PDF: 3.57MB]
 
 
 
General details
Date: 16 October 2011   Investigation status: Completed  
Time: 1041 UTC    
Location   (show map): near Suvarnabhumi Airport Bangkok, Thailand   Investigation type: Occurrence Investigation  
State: International   Occurrence type: Engine failure or malfunction  
Release date: 03 August 2012   Occurrence class: Technical  
Report status: Final   Occurrence category: Incident  
  Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer The Boeing Company  
Aircraft model 747  
Aircraft registration VH-OJS  
Serial number 25564  
Operator Qantas Airways Limited  
Type of operation Air Transport High Capacity  
Sector Jet  
Damage to aircraft Minor  
Departure point Bangkok, Thailand  
Destination Sydney, NSW  
Last update 14 November 2018