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Engineers traced the problem to a manufacturing defect in an insulator on the solid rocket motor, and telemetry data from all four boosters on the following flight in August exhibited “spot-on” performance, according to Bruno. But officials decided to recover the spent expendable motor casings from the Atlantic Ocean for inspections to confirm there were no other surprises or close calls.
The hangup delaying the next Vulcan launches isn’t in rocket production. ULA has…
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