Sea Launch said Thursday that it is ready to resume satellite launches following completion of the Sea Launch Failure Review Oversight Board (FROB) investigation into the failure of the ILS Proton Astra-1K mission. Sea Launch (Long Beach, Calif.), a partnership of Boeing [NYSE: BA], Russia’s RSC Energia, Ukraine’s SDO Yuzhnoye/PO Yuzhmash and Norway’s Kvaerner Group, plans to launch the EchoStar IX satellite in May.

Sea Launch grounded its fleet following the ILS Proton mission failure on Nov. 26, when the Block DM upper stage failed to complete the second of three planned burns. Similarities between the ILS Proton Block DM and the Sea Launch Block DM-SL upper stages required that Sea Launch determine if there were any issues that would have an impact on the Block DM-SL.

A Russian state commission recommended seven corrective actions to preclude similar failures in the future. The members of the Sea Launch FROB found that the corrective actions either do not apply to the Sea Launch configuration of the Block DM or are already in place within the existing Sea Launch hardware, processes and quality assurance procedures.