The US Federal Aviation Administration said on Sunday some Boeing Co 737 MAX and NG planes may have parts that were improperly manufactured and that it will require their replacement, the latest issue to hit the world’s largest plane maker.
The FAA said up to 148 leading edge slat tracks manufactured by a Boeing sub-tier supplier are affected and cover 133 NG and 179 MAX aircraft worldwide. The FAA said a complete failure of a leading edge slat track would not result in the loss of the aircraft, but a failed part could cause aircraft damage in flight.
Slats are movable panels that extend along the front of the wing during takeoffs and landings to provide additional lift. The tracks are built into the wing.
The 737 MAX was grounded globally in March following a fatal Ethiopian Airlines crash after a similar Lion Air disaster in Indonesia in October. The two crashes together killed 346 people.
Chicago-based Boeing has yet to submit a software upgrade to the FAA as it works to get approval to end the grounding of the 737 MAX. Boeing did not immediately comment on Sunday.