Lycoming Service Instruction 1009AV, dated August 2013, on engine TBOs has undergone both broad as well as very detailed, and sweeping changes, as to why the factory feels it is is being very straightforward on the likelihood of reaching TBO in today s extremely low flying hour environment. They seem to have lots of blame they would like to spread around. Here are some important elements as we understand them. Some owners are not following engine storage procedures, or taking care of engines properly. A second (and specious argument in our view) is that owners are using PMA parts, thus making TBOs impossible to establish when they use non OEM parts. Both Lycoming and TCM feel this way and have published it in their new service documents, which we will discuss in detail below.
展开▼
机译：关于发动机TBO的Lycoming Service Instruction 1009AV（2013年8月）进行了广泛，非常详细和全面的更改，这就是为什么工厂认为在当今极低的飞行中达到TBO的可能性非常简单的原因小时的环境。他们似乎有很多责任要散布。以下是我们了解的一些重要元素。一些所有者没有遵循引擎的存储程序，或者没有正确地维护引擎。第二点（在我们看来，这是一种似是而非的论点），即所有者正在使用PMA零件，因此，当他们使用非OEM零件时就无法建立TBO。 Lycoming和TCM都具有这种感觉，并已将其发布在新的服务文档中，我们将在下面详细讨论。
展开▼
