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Doesn't surprise me that failures came after . An aircraft which has recently undergone major repairs is far more likely to fail than one where the components may be older but which has been running well for months. It's the reason many things (appliances, etc.) are warranted 90 days, because the thinking is that if it was built right and survives the first 90 days, then it should last to its design lifetime. On new electronic components (transistors, etc.) it's called "infant mortality"; the failure curve has two bumps, one soon after it's put in service, one near the end of life.
BTW, a corollary of this is that some people ask their mechanic (or some other brave soul) to be the first to take the aircraft flying after repairs.
Ernie
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