The US Federal Aviation Administration has allowed Boeing to carry out test flights of 787 Dreamliner planes. The entire fleet of 787s was grounded last month after a battery on one plane caught fire, while a malfunction forced another to make an emergency landing. Regulators as well as Boeing have been conducting probes to find out what caused the incidents. The FAA said the test flights will help collect data about battery performance while the aircraft is airborne. A spokesman for Boeing, Marc Birtel, added that such data will support the continuing investigations into the cause of the recent 787 battery incidents. The FAA said it had asked Boeing to conduct extensive pre-flight testing and inspections and that the flights would be conducted.