Virgin Galactic rescheduled a commercial research test flight over a potential manufacturing defect.
The possible flaw was unrelated to an FAA investigation over an earlier flight, the company said.
Virgin pushed its space mission with the Italian Air Force back to mid-October at the earliest.
The spaceflight company said that during groundwork, a third-party supplier flagged a potential defect in a component of the flight-control system they provided.
"At this point, it is not yet known whether the defect is present in the company's vehicles and what, if any, repair work may be needed," Virgin Galactic said in a statement.
The company said it's conducting a vendor inspection, which was part of Virgin Galactic's usual safety procedures.
The mission, named "Unity 23," was initially slated for September or early October. It's now been pushed to mid-October at the earliest.
Virgin said the spaceflight would carry three paying crew members from the Italian Air Force and the National Research Council to conduct research relevant to current and future spaceflight systems and technologies.
The Federal Aviation Authority's grounding of a rocket plane, following Branson's trip to the edge of space, wasn't related to the now-delayed space mission. Virgin Galactic said the FAA matter was focused on air-traffic-control clearance and communications.
In a previous statement issued in relation to the FAA grounding, Virgin Galactic told Insider its rocket plane did not fly outside "the lateral confines of the protected airspace" but instead dropped "below the altitude of the airspace that is protected for Virgin Galactic missions."
Shares in Virgin Galactic tumbled 7% after the FAA news earlier this month.
"Our test flight processes and procedures are rigorous and structured to identify and resolve these types of issues," Michael Colglazier, Virgin Galactic's CEO, said in a statement. "We look forward to taking to the skies again soon."
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