Learn Hardcore Turkish: Konunun her kısmı raporda açıklanmalı. - Every part of the topic should be explained in the report.

Konunun is the genitive form of konu (“topic/subject”). The suffix -un (with vowel harmony) marks the possessor in Turkish, so konunun means “of the topic.” It links konunun (the possessor) to kısmı (the possessed noun “part”).

Why doesn’t kısmı have an accusative ending (‑ı), even though it seems like a direct object?

Because the sentence is in the passive voice. In Turkish passive clauses, the “object” of the active verb becomes the grammatical subject and remains in the nominative (unmarked) form. Hence kısmı, not kısmını.

What does her kısmı mean, and why is her placed before kısmı?

her means “each” or “every.” In Turkish, determiners like her always directly precede the noun they modify. So her kısmı = “each part.”

What is the function of raporda, and which case ending is that?

raporda is rapor (“report”) plus the locative suffix -da (with consonant harmony -da). It means “in the report,” indicating the location where the explanation should take place.