It's really not all that different than what FAA did after the AA191 crash at ORD back in 1979. The aircraft involved had an engine change some weeks before and improper procedures were used that resulted in damage (which later resulted in the engine separation).
When NTSB figured this out, FAA mandated inspections of all DC-10s (in case other airlines used the same "shortcut" engine change procedures that AA did), and I recall that 5 or 6 other DC-10s were found with loose engine pylons. I can remember the exact chronology, but the DC-10s were also grounded for awhile as a result.
The NTSB fellow in charge of the CLT investigation is John Goglia, and he was formerly in various maintenance positions at US Air(ways). Accordingly, any mechanically-related stuff is right up his alley, and I'm sure the truth of what happened will come out pretty quickly, and accurately.
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