Aviation safety investigations & reports

Engine failure; 93km east of Adelaide Airport, SA; 23 December 2005

Investigation number:
Status: Completed
Investigation completed


Download Final Report
[Download  PDF: 220KB]

On 23 December 2005 at about 1745 South Australian Summer Time, a British Aerospace Plc, J32, Jetstream aircraft was being operated on a scheduled passenger service from Mt Gambier to Adelaide in South Australia. The crew reported that during cruise flight at flight level (FL) 120 and in a shallow right turn, about 93 km east of Adelaide, the right engine briefly surged twice and then stopped.

After landing at Adelaide, the TPE331-12UHR-702H engine, serial number P66397C, was removed from the aircraft and forwarded to the manufacturer in the US for failure examination. The report of that engine examination indicated that the P/N 3103589-1 gear had a separated section of one gear tooth and several other damaged teeth. A metallurgical examination of the damaged components and the metal fragments found in the gearbox showed that there had been significant heavy wear of the mating surfaces of the spur gear teeth of both gears. The report further stated that experience had shown that the mating of a new or different gear, and a worn gear can accelerate tooth wear and lead to tooth fatigue cracking. In this instance the smearing of the separated surfaces and the damage sustained by the components precluded an assessment of whether the failure was due to fatigue. The report also indicated that, 'In the absence of an identified fatigue origin, there is also the possibility that a foreign object may have entered the gear mesh and overloaded a tooth'.

The engine manufacturer advised that they have submitted a Publication Change Request (PCR 029601) to the Inspection and Repair Manual 72-IR-15 specifically requiring an inspection for wear of the P/N 3103590-2 gear. That change is expected to be issued in late 2007.

Download Final Report
[Download  PDF: 220KB]
General details
Date: 23 December 2005   Investigation status: Completed  
Time: 1820 CSuT    
Location   (show map): 93km E Adelaide, VOR    
State: South Australia   Occurrence type: Engine failure or malfunction  
Release date: 17 May 2007   Occurrence category: Incident  
Report status: Final   Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer British Aerospace PLC  
Aircraft model 3200  
Aircraft registration VH-OAE  
Serial number 851  
Type of operation Air Transport Low Capacity  
Damage to aircraft Nil  
Departure point Mt Gambier, SA  
Departure time 17:20  
Destination Adelaide, SA  
Crew details
Role Class of licence Hours on type Hours total
Pilot-in-Command ATPL
Co-Pilot/1st Officer ATPL
Last update 16 February 2016