Aerosucre Boeing 737-200F (HK-5026, built 1981) experienced opening/unlocking of its main cargo door while taking off or soon after getting airborne. The aircraft safely returned to Mitù Airport (SKMU), Vaupes, Colombia. @AnalisisUrbano@AeromundoAvGeek@AeroCivilColpic.twitter.com/SczYW1bqwv