Avik DeTee-How Loo2025-01-062025-01-06201710.2298/FIL1712917Dhttps://dspace-cris.utar.edu.my/handle/123456789/10219The objective of the present paper is to prove the non-existence of real hypersurface with pseudo-parallel normal Jacobi operator in complex two-plane Grassmannians. As a corollary, we show that there does not exist any real hypersurface with semi-parallel or recurrent normal Jacobi operator in complex two-plane Grassmannians. This answers a question considered in [Monatsh Math, 172 (2013), 167-178] in negative.journal-article