Learn Hardcore Japanese: koukanbuhin ga todoki sidai, syuttyousyuuri wo simasu. - We will do the on-site repair as soon as the replacement part arrives.

Word

交換部品こうかんぶひん　が　届とどき　次第しだい、　出張修理しゅっちょうしゅうり　を　します。koukanbuhin ga todoki shidai, shutchoushuuri o shimasu.

Meaning

We will do the on-site repair as soon as the replacement part arrives.

Part of speech

sentence

Pronunciation

Course

Lesson

Breakdown of koukanbuhin ga todoki shidai, shutchoushuuri o shimasu.

What does 次第 mean here?

Here, 次第 means as soon as or once.

So 届き次第 means as soon as it arrives.

This pattern is common in formal or business Japanese:

Examples:

In your sentence, 交換部品が届き次第、出張修理をします。 sounds like a business/customer-service statement.

Why is it 届き次第 and not 届いた次第 or 届く次第?

Because 次第 attaches to the ます-stem of a verb.

The verb is 届く
Its ます form is 届きます
The stem is 届き

So:

This is just how the grammar works:

It may feel a little formulaic, and that is normal. It is a set expression used especially in formal written or spoken Japanese.