United Airlines flight bound for Japan grounded in San Francisco with engine issues San Francisco ChronicleUnited Airlines CEO addresses string of incidents, tells passengers carrier is safe Fox BusinessUnited Airlines Planes Have Seen 8 Incidents in 2 Weeks. What’s Going On? The New York TimesUnited CEO tries to reassure customers following multiple safety incidents CNNUnited Airlines CEO Scott Kirby vows to keep passengers safe after multiple mishaps CBS News