BEIJING (Reuters) – China Eastern Airlines has restarted using Boeing 737-800 jetliners for commercial flights less than a month after a crash that killed 132 people on board and grounded over 200 of its aircraft, data from a tracking website showed on Sunday. China Eastern flight MU5843, operated by a three-year-old Boeing 737-800 aircraft, took off from the southwestern city of Kunming at 09:58 a.m. local time (0158 GMT) on Sunday and landed at Chengdu, also in southwestern China, at 11:03 a.m. local time, data from Flightradar24 showed. That aircraft, which completed a test flight on Saturd…