Hong Kong, July 2 -- Fitch Ratings has lifted its outlook for Boeing to stable, from negative previously, as a result of an improvement in operations at the air framer's key commercial aircraft unit. Read More The agency also reaffirmed Boeing's rating of BBB-. "The outlook revision to stable reflects Fitch's view the post-strike production ramp up and enhanced financial flexibility, including the announced Jeppesen sale, have reduced downgrade risks," Fitch said. "The stable outlook also incorporates Fitch's expectation of gross debt reduction." Fitch said Boeing had increased 737 MAX production to 30 aircraft a month and aims for 38 aircraft a month by September. It forecast 787 output will average eight aircraft a month in 2026 compared ...