Enlil-kudurrī-uṣur (ca. 1196-1192 BC) was the eighty-first ruler of Ashur according to the Assyrian King List [http://oracc.museum.upenn.edu/riao/kinglists/assyriankinglist/index.html] (AKL) and he ruled for five years. The AKL records that he was a son of Tukultī-Ninurta I [http://oracc.museum.upenn.edu/riao/thekingdomofassyria13631115bc/tukultininurtai/index.html] and that he became king only after his brother Aššur-nādin-apli [http://oracc.museum.upenn.edu/riao/thekingdomofassyria13631115bc/ashurnadinapli/index.html] -- who had seized the throne after killing Tukultī-Ninurta -- and his nephew Aššur-nārārī III [http://oracc.museum.upenn.edu/riao/thekingdomofassyria13631115bc/ashurnarariiii/index.html] exercised kingship for nine (or ten) years; the latter seems to have shared power with Ilī-ipaddu (also read Nabû-dān and Ilī-iḫaddâ), a man who was both the grand vizier of Assyria and king of Ḫanigalbat (see Brinkmann 1976-1980, 50-51). Although the AKL does not comment on the nature of Enlil-kudurrī-uṣur's succession, it is possible that Enlil-kudurrī-uṣur deposed his nephew and took the throne for himself.
Enlil-kudurrī-uṣur ruled at a time when there as tension between Assyria and Babylonia. The Synchronistic History (Grayson 1975, 161-2) reports that he fought with his Babylonian contemporary Adad-šuma-uṣur. According to the AKL, Ninurta-apil-Ekur [http://oracc.museum.upenn.edu/riao/thekingdomofassyria13631115bc/ninurtaapilekur/index.html], a son of Ilī-ipaddu, marched on Ashur with his Babylonian allies and seized the throne of Assyria from Enlil-kudurrī-uṣur.
Poppy Tushingham
Poppy Tushingham, 'Enlil-kudurrī-uṣur', The Royal Inscriptions of Assyria online (RIAo) Project, The RIAo Project, a sub-project of MOCCI, 2017 [http://oracc.museum.upenn.edu/riao/thekingdomofassyria13631115bc/enlilkudurriusur/]