Boeing Co discovered debris that would pose potential safety threats in the fuel tanks of several 737 MAX planes that are in storage and waiting to be shipped to airlines, according to an internal memo on Tuesday.
Foreign object particles, an industrial term for rags, instruments, metal shavings, and other supplies left behind by workers through the manufacturing operations has been a quality control issue for numerous Boeing planes, akin to its KC-46 tankers.
Mark Jenks, general manager of the 737 programs, told staff in the memo that such debris was unacceptable and that the company was taking steps to handle the difficulty in its production system.
A Boeing spokesperson confirmed the memo’s authenticity and stated Boeing doesn’t see the debris as adding to delays in the plane’s return to service.
The objects had been found throughout maintenance work on among the hundreds of 737 MAX jetliners Boeing has constructed; however, not delivered because of a worldwide ban imposed last March following two crashes that killed 346 people, he stated.
The FAA didn’t instantly respond to a request for comment.