Questions remain about the issue that grounded hundreds of flights in North Texas on Friday.

Over the weekend, officials revealed hundreds of delays and cancellations at DFW and Love Field were the result of cut fiber optic cable lines in Denton County.

The Federal Aviation Administration blamed Dallas-based Frontier Communications for “multiple failures” disrupting radar operations at the Dallas TRACON facility.

Located in the middle of DFW Airport, TRACON handles flights coming in and out of the regional airspace before they’re handed off to individual airport towers.

Frontier told NBC 5, “Another carrier’s third-party contractor, working in Argyle, accidentally cut our fiber lines.”

Both the FAA and American Airlines also expressed frustration with FAA contractor L3Harris for “fail

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