A plane had to turn back just 20 minutes into its flight due to an issue with the toilets, despite carrying 84 plumbers.
The majority of the professionals on board Saturday’s Norwegian Airlines flight from Oslo to Munich work for plumbing company Rorkjop.
Chief Executive Frank Olsen told Norwegian newspaper Dagbladet that his employees “would have liked to fix the restrooms”, but were unable to do so.
The fault had to be fixed from the outside, so there was little the plumbers could do to help.
“Unfortunately it had to be done from the outside and we did not take the opportunity to send a plumber at 10,000 metres,” Olsen said.
The irony sparked much amusement on social media, where many shared accounts of their own loo-based drama in the air.
A spokesperson for Norwegian said: “Flight DY1156 from Oslo to Munich on Saturday January 27 returned to Oslo due to a technical fault with the toilet. The aircraft was repaired and continued with the flight later that day.
“We would like to thank passengers for their patience and would like to apologise for the inconvenience.”