Engine in-flight shutdown, VH-NXK, Boeing 717-200, 56 km south-south-west of Newman Aerodrome, Western Australia, on 13 July 2007

AO-2007-024

Summary

On 13 July 2007 at about 1420 Western Standard Time, a Boeing Company 717-200 aircraft, registered VH-NXK, was being operated on a scheduled passenger service from Newman, WA to Perth, WA, when the right engine failed during the climb to cruise. The flight crew disconnected the autopilot, actioned the Engine Fire/Severe Damage checklist, and commenced decent to flight level 140. The flight crew broadcast a PAN to air traffic services and advised the cabin crew and passengers that the aircraft would be returning to Newman Aerodrome. The aircraft landed safely at Newman Aerodrome.

The operator's maintenance organisation carried out an internal inspection of the failed engine and found that all the blades on the high-pressure turbine stage disc had been sheared off.

A subsequent investigation by the engine manufacturer revealed that a high-pressure turbine stage 1 blade had separated from the blade disc below the blade platform due to low-cycle fatigue causing the remaining HPT1 blades to separate from the disc. This led to the subsequent engine in-flight shutdown. This failure was similar to a number of previous engine failures that have occurred since November 2003.

The engine was removed from the aircraft for shipment to the engine manufacturer for investigation and repair. A serviceable engine was fitted, and the aircraft was returned to service.

At the time of the incident the aircraft operator was engaged in replacing all the LIP 3 standard of HPT1 blades in their fleet engines with the new HPT1 blade.

Occurrence summary

Investigation number AO-2007-024
Occurrence date 13/07/2007
Location 56km SSW Newman
State Western Australia
Report release date 06/04/2009
Report status Final
Investigation level Systemic
Investigation type Occurrence Investigation
Investigation status Completed
Mode of transport Aviation
Aviation occurrence category Engine failure or malfunction
Occurrence class Incident
Highest injury level None

Aircraft details

Manufacturer The Boeing Company
Model 717
Registration VH-NXK
Serial number 55092
Sector Jet
Operation type Air Transport High Capacity
Departure point Newman, WA
Destination Perth, WA
Damage Nil