Regulators on Thursday published a new rule that governs the lithium-ion batteries on Boeing Co’s 787 passenger jet, more than three months after battery problems grounded the plane worldwide.

The Federal Aviation Administration estimated the cost of battery repairs for six planes owned by United Continental Holdings Inc’s United Airlines at $2.8 million.

Reporting by Alwyn Scott; Editing by Gerald E. McCormick. Copyright (2013) Thomson Reuters. Click for restrictions

Photo Credit: File photograph of an undamaged battery used in the Boeing 787 Dreamliner jet provided by NTSB. Reuters