A geared turbine engine includes a first rotor, a second rotor, a gear train and an engine casing. The rotors and the gear train are arranged along an axial centerline. The gear train connects the first rotor to the second rotor. The casing extends circumferentially around the centerline and houses the first rotor, the second rotor and/or the gear train. The casing includes a casing door. The casing door includes a duct and a thrust reverser. The duct extends axially along and at least partially around the centerline.