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Etops Revisited

机译:重访Etops

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摘要

Electrically related in-flight fires may be a greater threat to the safety of long-range flights than engine failures. A new report on extended twin-engine operations (ETOPS) marks a major effort to rationalize a regulatory patchwork dating back at least to 1985. The report may aggrieve operators of three- and four-engine air transport aircraft, as it requires them to incorporate sufficient in-flight fire suppression to handle the longest diversion to an alternate airport―the same requirement applied to twin-engine airliners. The currently approval standard for 180-minute ETOPS (i.e., three hours to an alternate airfield on one engine) is 0.02 shutdowns per 1,000 hours of engine operation. That's an inflight shutdown (IFSD) rate of one every 50,000 hours. Many of the world's 92 ETOPS operators are achieving 0.01 shutdowns per 1,000 hours or, for twinjets on eight-hour ETOPS flights (accumulating 16 hours of total engine time per flight), an average IFSD of one every 6,200 flights.
机译:与发动机故障相比,与电气相关的机上火灾可能对远程飞行的安全构成更大的威胁。一份有关扩展双引擎运行(ETOPS)的新报告标志着一项合理的工作,该合理化至少可以追溯到1985年进行。这些报告可能会使三引擎和四引擎航空运输飞机的操作员感到不满,因为它要求他们将足够的机上灭火功能,可以处理最长的改航至替代机场的需求-双引擎客机的要求相同。当前批准的180分钟ETOPS(即,一台发动机到另一个飞机场三小时)的标准是每1000个小时发动机停机0.02次。那是机上关机(IFSD)速率每50,000小时之一。世界上92个ETOPS运营商中有许多都实现了每1,000小时0.01次停机,或者对于8小时ETOPS飞行中的双喷气飞机(每次飞行累计发动机总时间为16小时),IFSD平均为每6200次飞行一次。

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