Aviation safety issues and actions

Turbine blade fatigue endurance limit

Issue number: AO-2010-066-SI-01
Who it affects: Operators of aircraft fitted with Rolls-Royce RB211-524 engines
Issue owner: Rolls Royce
Transport function: Aviation: Air transport
Background: Investigation Report AO-2010-066
Issue release date: 16 April 2012
Current issue status: Adequately addressed
Issue status justification:

Will ultimately reduce the likelihood of LP2 blade failures. In the meantime, the risk of another complex failure is very low.

Safety issue description

High service time stage-2 LP turbine blades were susceptible to a reduction in fatigue endurance as a result of vibratory stresses sustained during operation at speeds close to the maximum.

Proactive Action

Action number: AO-2010-066-NSA-033
Action organisation: Rolls Royce
Date: 16 April 2012
Action status: Closed
The manufacturer is recommending that operators replace high service time stage-2 LP turbine blades.

ATSB comment:

Replacment of high time blades should reduce the likelihood of blade failure.
Last update 24 February 2014