Boeing Co.’s $2.5 billion agreement to put an end to the criminal investigation by the Justice Department into the 737 MAX debacle settles one of its highest-profile problems, but the plane maker still faces other legal and business problems.Federal Aviation Administration officials have said Boeing faces possible civil penalties stemming from its so-called lack of directness in its dealings with regulators before and after two MAX crashes that claimed 346 lives.Ever since those crashes, Boeing has touted the overall safety of its 737 family of single-aisle jets. An older model of the jet, a 737-500, carrying 62 people crashed into the Java Sea Saturday. The cause of the accident was unknown. Boeing said it was keeping track of the incident. Pilot errors and airline maintenance lapses generally have been responsible for major crashes of such earlier-model 737 aircraft.