New York (AFP) – Boeing said Wednesday it is close to receiving regulatory approval to resume 787 jet deliveries, a move that could help reverse lackluster profits, but warned that its production ramp-up for the 737 MAX would be slowed by supply chain problems. The US aviation giant’s two most popular commercial planes figured prominently in its mixed quarterly earnings report, with the lack of revenue from the 787 Dreamliner again a big drag. Shares gyrated following the announcement. A resumption of 787 deliveries will restore a key source of revenue, but a more protracted 737 MAX ramp-up s…