Delta Air Lines said the flight crew reported an odor while taxiing to the gate . The crew shut down both engines and notified the airport fire department . Passengers remained on board as firefighters checked for a heat source . Plane was towed to the gate and passengers allowed to disembark .
Delta said the flight crew reported an odor while taxiing to the gate . The crew shut down both engines and notified the airport fire department . Passengers remained on board as firefighters checked for a heat source . Plane was towed to the gate and passengers allowed to disembark .