Bloomberg Seven weeks after the Air Force declared its first F-35 jets combat ready, 10 of the aircraft aren’t flying after service mechanics discovered “peeling and crumbling” insulation wrapped around lines that carry liquid to cool combat systems and computers. The poor insulation is suspected on 57 aircraft, including 42 on Lockheed Martin Corp.’s production line. The issue is …

  Bloomberg Deutsche Lufthansa AG’s pilot union said negotiations over pay, pensions and promotion have failed, adding to concern about the carrier’s debt and liabilities after S&P Global Ratings cited pension costs as a prime reason for putting it on watch for possible credit downgrade. Talks that began early this year on contracts and career paths for flight crew at …

  Bloomberg South African Airways said tougher competition, rising finance costs and a weakening of the rand led to the state-owned carrier’s biggest loss in more than a decade. The loss of 4.7 billion rand ($331 million) in the year through March 2015 was also exacerbated by the outbreak of the Ebola virus in West Africa, which hurt traffic between …