来た時

when (someone) came

→ 来る
phrase Common #5,990
when (someone) came Used to say “when someone came” or “when someone arrives,” depending on context. 時 means “when,” and 来た is the past form of 来る (to come).
JA: 駅に来た時、電話してください。
EN: When you arrive at the station, please call me.

荷物を取りに来た時それはいいや

When you come to pick up your stuff—actually, never mind.

— キャッチ・ミー・イフ・ユー・キャン (2002)

その少年は父が彼を助け来た時まさに溺れるところでした

The boy was just about to drown when his father came to save him.

近くに来た時寄って

If you're ever in the area, stop by.

来た時その老人はぐっすり眠っていた

When the bear came, the old man was fast asleep.

前に来た時の前で迷った

The last time I came, I got lost in front of the station.

見たわけではないんですが利吉を見失ってこの辺りまで来た時

I didn’t actually see him, but after losing sight of Rikichi, I came as far as this area.

— 七人の侍 (1954)

アメリカ来た時

When I came to the United States

— ビッグ・シック ぼくたちの大いなる目ざめ (2017)