PW4000-94 Modification & Upgrade Programmes, Issue 54 Oct/Nov 2007

Issue 54 Oct/Nov 2007

The PW4000-94 has had several major upgrade & modification
programmes. These are the Phase III programme, the more recent ‘ring
case’ modification, and the withdrawal of a new HPT blade alloy. These
improvements have led to a higher level of on-wing performance &

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