Abstract: This article elaborates the basic program and the counting method of the life evaluation with feast squares according to Weibull distribution for the turbine cooler. The turbine cooler (thereinafter for short turbine) is a rotation part of high speed for the airplane environment control system. It is difficult to evaluate the life of the turbine as it always works with high speed and variable load (the speed can be 100,000 r/min). The main negative influence on the turbine life is the wear out of lapse roll bearing which is a stochastic phenomenon with continuation of time under a special condition. It is not economical nor practical to find the life evaluation through abundant and long term sampling test. So the primary technical approach is the outfield information,which has advantages of numerous sub samples life like environment condition and high reliability with a large number of outfield date statistics diagnosing the weakness of products. It is confirmed that the turbine life is in accordance with Weibull distribution.

Key words: life evaluation, turbine, cooler s