Boeing has identified another problem with the 787 Dreamliner as the catalogue of concerns raised with the aircraft continues to go.
The US-based manufacturer said the latest fault was connected to it fire extinguisher system.
An investigation will now be launched after a wiring defect was found in a fire extinguisher system on three 787s operated by All Nippon Airways of Japan.
In a statement Boeing said: “The safety of those flying on Boeing aeroplanes is our top priority.
“We will thoroughly examine this issue and take the appropriate steps.”
The problem is the latest to hit the Boeing aircraft, which was grounded in January due to battery problems.
Last month a fire broke out on an Ethiopian Airlines 787 parked at Heathrow.
The fire was later linked to a problem with a transmitter.