Embattled aircraft manufacturer Boeing was facing more questions about its Dreamliner on Friday afternoon following two separate incidents.
Heathrow airport was temporarily shut down after fire crews were called to a fire onboard an Ethiopian Airlines 787 on the ground.
Meanwhile, a Thomson Airways 787 was forced to turn back to Manchester Airport after technical problems were reported en route to Orlando.
Heathrow airport has now fully opened, while Thomson said it was inspecting its aircraft while an alternative was found to transport its customers to the US.
The 787 was recently grounded while investigations were carried out into a series of battery fires.
After those investigations, Boeing said it was confident that any similar fire would be contained.