Chief executive Scott Kirby’s reputation for frank talking has won investor plaudits and helped boost the airline’s shares

The CEO of United Airlines penned a letter to employees outlining what he thinks the Federal Aviation Administration needs to do to fix all the delays plaguing Newark Liberty International Airport. The delays began last Monday when crews in the Philadelphia air traffic control facility that lines up flights into and out of Newark lost radar and communications with the planes for at least 30 seconds.

Newark has had disruptions since April 28, when controllers lost contact and couldn't guide planes for upwards of 30 seconds.