Boeing said on Tuesday it would sell portions of its Digital Aviation Solutions business, including navigation unit Jeppesen, to private equity firm Thoma Bravo for $10.55 billion. The U.S. planemaker

The deal, with the private equity firm Thoma Bravo, will help the struggling aerospace manufacturer pay down debt and streamline its operations.

Buyout firm Thoma Bravo is in advanced talks to acquire Boeing's Jeppesen navigation unit, with final bids valuing the unit at more than $8B and an announcement expected later this week.