8 ms·

I bet they're less concerned with # of firings and more with fatigue/wear from atmosphere reentry. Very hard to test on ground.

• dasmoth 10y ago
  They've now got 45 intact engines back, from a variety of re-entry regimes. We know they've done an all-up static fire. Several of the returned stages have had engines removed and I imagine some of these have been tested. If there's a major problem, they already know about it.