Date: 07 Dec 98 23:19:25 From: firstname.lastname@example.org (Tjarko de Jong) Organization: Delft University of Technology References: 1 2
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On 30 Nov 98 03:07:44 , Chuanga@cris.com (H Andrew Chuang) wrote: >In article <airliners.1998.1774@ohare.Chicago.COM>, >MAC <email@example.com> wrote: >>Am I right in thinking that UA is suffering high costs because of 777 >>engine problems? >> >>Out of 8 flights in the last year I have had 4 delays or cancellations >>because of engine related problems...am I unlucky or typical? > >Perhaps you were just unlucky. The engine dispatch reliability and >inflight shutdown rate of the P&W engines on UA's B777s are very >similar to those on other earlier twin-engine planes. The former rate is >well into the high 99% range, and the latter is comfortably below the >ETOPS-required rate of 0.02 per 1,000 engine flight hours. I don't mean >to say the engines are problem free (because they are not), but I don't >believe there are any serious abnormalities. But the ETOPS rate is for in-flight shutdown, in order to keep this at an high level you might need more preventive maintanance on the ground. Or more tests.