Washington: A new possible problem with the American aerospace major Boeing's 737 Max airplanes has several airlines once again pulling dozens of the troubled jets out of service. Boeing announced that it has recommended 16 carriers to address a potential electrical issue in a specific group of 737 MAX planes, which were globally grounded after two fatal crashes that took place within months, before further operation.

"We are working closely with the U.S. Federal Aviation Administration on this production issue. We are also informing our customers of specific tail numbers affected and we will provide direction on appropriate corrective actions," Boeing said.

The company said the issue is not related to the flight control software system that has been blamed in two crashes that killed 346 people. The 737 Max had only returned to commercial U.S. service in late December after the jets were grounded for some 20 months following crashes in Indonesia and Ethiopia.

The new problem is one that "could affect the operation of a backup power control unit" in newly manufactured 737 Max jets, according to the Federal Aviation Administration (FAA). The problem apparently resulted from changes in the production process at Boeing.

The FAA said Boeing had notified the agency late Thursday of its recommendation to temporarily remove some planes from service to address a manufacturing issue that could affect the operation of a backup power control unit.

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