A Dallas federal judge has delayed a planned Sept. 5 hip implant trial until later this month after a split federal appeals panel requested that he halt the proceedings due to his own “grave error.”

In a Thursday opinion, two of three judges on a panel of the U.S. Court of Appeals for the Fifth Circuit refused to grant a petition for writ of mandamus filed by DePuy Orthopaedics Inc. to halt the trial. But two of the three also concluded that U.S. District Judge Ed Kinkeade, who is presiding over 9,300 cases alleging DePuy's Pinnacle hip implants are defective, committed a “grave error” in allowing certain trials to take place before him, including the one scheduled this month on behalf of eight New York plaintiffs.

“Despite finding serious error, a majority of this panel denies the writ that petitioners seek to prohibit the district court from proceeding to trial on plaintiffs' cases,” wrote Circuit Judge Jerry Smith. “A majority requests the district court to vacate its ruling on waiver and to withdraw its order for a trial beginning September 5, 2017.”