If telemetry shows all engines performing nominally right up until a structural failure signature appears, where does the investigation immediately pivot away from?

Answer

Engine control.

If telemetry shows all engines performing nominally leading up to a structural failure signature, the investigation immediately pivots away from engine control toward structural loads or propellant mass management within the tanks.

If telemetry shows all engines performing nominally right up until a structural failure signature appears, where does the investigation immediately pivot away from?

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