Was the mail cart still loaded when they took it downstairs?

How to say “Was the mail cart still loaded when they took it downstairs?” in Japanese

In Japanese

あの郵便物用台車を下の階に持っていったとき、まだ荷物が積まれてたの？

Ano yūbinbutsuyō daisha o shita no kai ni motte itta toki, mada nimotsu ga tsumareteta no?

Was the mail cart still loaded when they took it downstairs? in other languages