Last year a Singapore Airlines Airbus A330 retracted while the aircraft was undergoing a check. Now, a plane can land without a nose gear if it really has to.
But a plane certainly isn’t going to be able to taxi out and take off without a working nose gear. Via Aviation Herald, an Ethiopian Airlines Boeing 787 flight ET-702 had finished boarding and was preparing for departure when “the aircraft settled on its nose after the nose gear collapsed.”