WASHINGTON: The US Federal Aviation Administration (FAA) said Tuesday it had lifted a brief order grounding all JetBlue flights, after the airline suffered a system outage. The FAA said in an advisory that the ground stop, which was in force for less than an hour, was issued at the airline’s request. JetBlue said a system outage was to blame for its ground stop request. “A brief system outage has been resolved and we have resumed operations,” the airline told AFP in a statement. The FAA did not immediately reply to AFP’s request for comment.