请问when在这句话中引导的是什么从句?

问题描述:

请问when在这句话中引导的是什么从句?
I haven't seen her since the time when she had the accident.
when在这里是引导的定语从句还是时间状语从句呢?

定语从句 time是 先行词 后面的when she had the accident就是在讲time
希望可以帮到您!