how do you think life components should be or are controlled?
I
do know that an APU Door Actuator would be an "On Condition" part.
I also know that there may be for example an SRT for a lifed component to be removed at the appropriate time. But that doesn't constitute component life control, it is the means by which that task is called out at the proper time that constitutes life control and there are various methods available to achieve this. One airline may use AMOS, (with which Spotty M will be familiar), another may use a specialised component record module in a different MRO IT system, yet another may use direct manual control through component control cards in a "Kardex" system with weekly checks to monitor the forecast and issue the removal card at the proper time. I've worked with all of these methods and they all work (albeit with different problems.)
The part may move from one aircraft to another, it may, like a fire extinguisher squib, have an absolute life that is consumed even when the part is on a shelf in stores or it may, like a landing gear, have an undefined ultimate life that is only determined as a result of the initial tear-down inspection, and so on. Lifed part control is a complex business and is seldom the business of AMP
routine tasks. Lifed components are controlled through
individual hours/cycle monitoring, not through routine aircraft task cards as described in the original question.