Boeing Co. agreed to sell its flight navigation unit and other digital assets to Thoma Bravo for $10.6 billion in cash, the first major portfolio transaction under Chief Executive Officer Kelly Ortberg as he seeks to shore up the planemaker’s finances.

Private equity giant Thoma Bravo is reportedly in advanced negotiations to acquire Boeings Jeppesen navigation division in a deal potentially valued between $8 billion and $9 billion, according to Bloomberg News.

Boeing ( NYSE: BA) announced Tuesday it reached a definitive agreement to sell significant portions of its Digital Aviation Solutions business to private equity firm Thoma Bravo for $10.55 billion in cash. The transaction includes high-profile aviation technology assets such as Jeppesen, ForeFlight, AerData and OzRunways.