The only thing that can really be taken from the AIBN statement is they haven't yet established why the fatigue occurred with a sufficient level of confidence to agree that the removal of one type of planet gear assembly and adding a more rigorous check regime, will be sufficient to restore safety margins. They remain out of step with the European Agency, the US and the manufacturer. The update merely tells us they will continue with their work. This is a tough one - no guarantees of prevention combined with no guarantees of detection - different payers with very different opinions about the degree of risk involved in returning the aircraft to service as is.
Last edited by birmingham; 5th Feb 2017 at 16:47.