ptldM3
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PLEASE NOTE: the total life of basic version of AL-31F/FN is only 1500 h, time between overhauls(TBO)-500h,far short than the airframe life.
Your Russian source contradicts your statment. the MTBO is 1000 hours, and it says something about a 4,000 hour life, i'm assuming the 4,000 hour figure is for the 117S since you copied and pasted a fraction of the original source.