сработала

went off (worked/triggered)

s r ɐ b o t ə ɫ ə → сработать
с away, down, off, or together; often marking completed action + работа to work + ла past tense, feminine singular
verb · feminine singular · past indicative Rare #32,839
went off (worked/triggered) Often used about alarms, sensors, mechanisms, or a plan/idea that “worked”.
RU: Сигнализация сработала ночью.
EN: The alarm went off at night.
Conjugation of сработать
Indicative past

Есть, но она не сработала.

There is one, but it didn't work.

— O Som ao Redor (2012)

Когда сигнализация сработала, их ещё не было.

When the alarm went off, they still hadn't arrived.

— Бешеные псы (1992)

Эдди, на каком этаже сработала тревога?

Eddie, on which floor did the alarm go off?

— Крепкий орешек (1988)