Resurrect deceased pilot
Go into the pilot selection screen from the control center. Then highlight the dead pilot's name from the list. Now double-click on the name, then double click on the shiny part of the harness buckle on the picture of the pilot in the cockpit. Click on "OK" to freeze the screen. Wait a few seconds, then click on "OK" to go back to the control center. The pilot's status will change from "Deceased" to "Pining for the fjords" to confirm correct code entry.