No analysts have recommended investors to sell Boeing shares. Under intensifying pressure from airlines and the FAA following a series of MAX-related quality issues, Boeing said on Monday it will add further quality inspections for its best-selling jet series and deploy a team to Spirit AeroSystems to check the supplier's work on the door plug involved in the accident. "All of this is likely to lead to higher costs over time. And while it's not clear how much at this point, it doesn't seem unreasonable to think that an extra 1,000 inspectors might add $250 million in annual costs," Citi analyst Jason Gursky said. (Reporting by Abhijith Ganapavaram in Bengaluru; Editing by Shounak Dasgupta)