OTTAWA, March 15 (Reuters) - Aircraft maker Bombardier Inc. (BBDb) (BBDa) said on Friday it would correct a fuel-leak problem in 31 regional jets within two weeks, after Transport Canada warned airlines who fly the planes to carry extra fuel. Bombardier said a coupling in one of the fuel tanks of the CRJ700, 70-seat aircraft tends to unfasten, letting fuel flow inadvertently to another tank, with the possibility of that tank overfilling and leaking. "This is not an issue of safety. As a precautionary measure, (Transport Canada) asked us to correct this," Ken Swartz, a spokesman for Bombardier, told Reuters. Transport Canada told airlines last week to carry extra fuel when flying the jets. No Canadian airlines fly the CRJ700, which is just over a year old. But the U.S. Federal Aviation Authority issued an emergency directive this week regarding the leak. The FAA said the leak could starve the engine of fuel or could cause a fire when when the aircraft is on the ground. However, Transport Canada said the FAA did not consider the issue serious enough to stop flying the planes. Swartz said Bombardier had started correcting the problem even before Transport Canada issued its warning. "We've been on top of this for a number of weeks," he said. He said Bombardier is changing the coupling on all 31 planes, with a more "robust" model.