Boeing Co. is talking to a group of banks about a potential loan as it deals with the production halt of its grounded 737 Max jetliners, according to people familiar with the matter.

Citigroup Inc. is leading the discussions between Boeing and a small group of banks, said the people, who asked not to be named because the details are confidential. The precise structure and timing of the loan is in flux, but the financing may be an investment-grade term loan, they said.

Representatives for Citi and Boeing declined comment.