The return test flight of an A380 from Hamburg to Toulouse was delayed Sunday due to technical problems with the superjumbo's landing gear, an Airbus spokeswoman said, according to AP. The plane, which flew to Hamburg's Fuhlsbuettel airport Saturday for the Airport Days show there, was unable to return to southern France as scheduled due to leakage in the landing gear's hydraulic system, spokeswoman Cornelia Lindberg said. She said the leakage was nothing unusual, given the hard testing program the enormous airplane is undergoing. The A380 _ the world's largest airliner _ was to return later Sunday following repairs, Lindberg said.