USA TODAY Just months after the Boeing 737 Max was ungrounded following two fatal crashes, major airlines are taking some of the planes out of service again due to a potential electrical issue. Boeing called it a "production issue'' and told 16 airlines, including Southwest, American and United, to temporarily ground certain Max aircraft from service. The planes will be inspected to "allow for verification that a sufficient ground path exists for a component of the electrical power system.'' "The FAA will ensure the issue is addressed,'' the Federal Aviation Administration said in a statement. "Passengers should contact airlines about possible flight delays and cancellations.''