We have performed a partial-wave analysis of elastic tfd scattering for the currently available experimental data with attention to the uncertainty in the moduli of 'Pz and 'D, S-matrix elements in the e~ergy range TnL=1l7~325MeV. The moduli which are larger than the previous partial wave solutions and compatible with the three-channel (pp, 7fd, NLl) unitarity, are found to be allowed below Tn L =256 MeV. ' from a prediction of the clockwise-rotating Nil~ Nil amplitude with r=2+.6) This prediction had some criticism on the approximation used in the evaluation of the scattering amplitude. 5 ),7) Improvement in the evaluation 7 ) required the information on the trd ~ trd scattering amplitude 8 ),9) and led to the necessity of re-examination of the published trd ~ trd amplitudes. We have to study, therefore, what amplitudes are allowed from the present experimental data set which is still far from complete. Published solutions of the partial-wave analyses (PWA) of trd ~ trd process,8),9) of which 3 Pz and 3D3 show resonance-like behaviour, were obtained by Faddeev-theory based searches in the sense that the solutions were searched for around Faddeev theory amplitudes, either by starting from or constraining around them. These approaches were taken because the experimental data were not enough to determine the scattering amplitude uniquely. The Faddeev theory, being consistent with gross features of experimental results, may be taken as a reasonable starting point for PW A. The calculated amplitudes by this theory, however, show non-negligible variations among different groups depend ing on the approximation methods taken by each of groups. The PW A amplitudes obtained by starting from different theoretical amplitudes retain the features of the starting parameters, reflecting the incompleteness of the present experimental data set. Therefore, we should look for solutions widely around the theoretical ones.