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Boeing 737 Max jets sit parked on the tarmac at the Boeing Factory in Renton, Wash., on March 21, 2019.Lindsey Wasson/Reuters

U.S. and European aviation safety regulators will meet with Boeing Co. this week in an effort to complete a 737 Max software documentation audit – a key step toward the grounded plane’s eventual return to service.

The European Union Aviation Safety Agency (EASA) and Federal Aviation Administration (FAA) both confirmed on Tuesday that they will meet in the Seattle-area with Boeing before heading to a Rockwell Collins facility in Cedar Rapids, Iowa, in an effort to complete the audit.

Documentation requirements are central to certification for increasingly complex aircraft software and can become a source of delays. In 2008, EASA nearly derailed Europe’s Airbus A400M military transporter over software documentation after a failed audit.

In early November, EASA and FAA met with Boeing at the Rockwell Collins facility in Cedar Rapids and did not approve the audit. Instead, they sought revisions to the documentation of the 737 Max software fix and flagged a number of issues, Reuters reported.

In mid-January, Boeing will halt production on the best-selling plane, which has been grounded since March after two crashes in Ethiopia and Indonesia that killed 346 people in five months. Boeing said on Monday it was reassigning 3,000 employees to other jobs as a result of the temporary halt.

Reuters has reported previously that the FAA is unlikely to approve the plane until at least February and perhaps until March or later.

Boeing said in November that regulators had requested the “information be conveyed in a different form, and the documentation is being revised accordingly.”

Boeing did not immediately comment on Tuesday.

In September, FAA administrator Steve Dickson said the agency had told Boeing it is “better to be very methodical and very detailed rather than try to rush a partially completed product and then say, ‘We’ll get back to you with the rest of it.’ ”

Aviation software audits frequently uncover inconsistencies or omissions in documentation but rarely lead to changes in the underlying software or system, according to an industry official.

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