A major outage has plunged more than 80 percent of the island back into darkness. Millions of Puerto Ricans are again without power after a high-voltage transmission line that had been repaired by Whitefish Energy, a Montana contractor now facing an FBI investigation, failed Thursday. The Puerto Rico Electric Power Authority reported that power generation across the island plummeted from 40 percent to 18 percent on Thursday, a major blow to the island’s recovery after Hurricane Maria struck 50 days ago. Blackout Puerto RicoPREPA confirms power generation has plummeted to 18% after a failure of Cambalache Manatee 230KV line.