Îndată ce compania aeriană localizează valiza, trimite numărul de referință.

Îndată ce means as soon as.

It is perfectly correct, but it sounds a little more formal or written than some everyday alternatives. In conversation, many speakers would also say:

• imediat ce
• de îndată ce (also somewhat formal)

So in this sentence, îndată ce compania aeriană localizează valiza means as soon as the airline locates the suitcase.

Yes. Both are definite singular feminine nouns.

In Romanian, the definite article is usually attached to the end of the noun, unlike English, where you use a separate word such as the.

• companie = airline/company

• compania = the airline/company

• valiză = suitcase
• valiza = the suitcase

So:

• compania aeriană = the airline
• valiza = the suitcase

This is one of the first big differences English speakers notice in Romanian: the article is often suffixed to the noun.

In Romanian, adjectives usually come after the noun they describe.

So:

• companie aeriană = airline
• compania aeriană = the airline

The adjective aeriană agrees with compania in gender, number, and definiteness context:

• companie is feminine singular
• so the adjective is also feminine singular: aeriană

This noun + adjective order is much more normal in Romanian than adjective + noun.

Localizează is the 3rd person singular present tense of a localiza.

So it means:

• he/she/it locates
• the airline locates

Here, the subject is compania aeriană, which is grammatically singular, so Romanian uses localizează.

Even though English might sometimes say will locate in similar contexts, Romanian often uses the present tense after time expressions like îndată ce.

That is very normal in Romanian.

After conjunctions like îndată ce (as soon as), Romanian often uses the present tense to refer to a future event.

So:

• Îndată ce compania aeriană localizează valiza...
  literally looks like As soon as the airline locates the suitcase... but the meaning can be future: As soon as the airline locates the suitcase, ...

English often does something similar in time clauses:

• As soon as the airline finds the suitcase, it will send...

So this is not a strange tense choice; it is the normal pattern.

The subject is understood to be the same as in the first clause: compania aeriană.

Romanian often omits subject pronouns or repeated subjects when the meaning is clear. This is because the verb form itself already gives useful information about the person and number.

So:

• compania aeriană localizează valiza, trimite numărul de referință

means:

• the airline locates the suitcase, (the airline) sends the reference number

Repeating compania aeriană would be possible, but it would usually sound less natural unless you wanted emphasis or extra clarity.

Numărul de referință means the reference number.

Romanian often uses de to link nouns in expressions of type or function, where English often uses one noun directly before another.

Compare:

• număr de telefon = phone number
• număr de ordine = serial/order number
• număr de referință = reference number

So de referință here means something like for reference / of reference type, not possession.

Also note:

• număr = number
• numărul = the number

The comma separates the subordinate clause from the main clause.

Structure:

• Îndată ce compania aeriană localizează valiza = subordinate time clause
• trimite numărul de referință = main clause

Romanian usually writes a comma between these when the subordinate clause comes first.

So the punctuation helps show the sentence structure: As soon as X happens, Y happens.

Yes. That would also be correct.

Both mean as soon as:

• îndată ce
• imediat ce

The difference is mostly one of style and register:

• imediat ce often sounds a bit more common in everyday speech
• îndată ce can sound slightly more formal or written

In many contexts, they are interchangeable.

Yes, that is also correct and natural.

Romanian word order is flexible enough to allow both versions:

• Îndată ce compania aeriană localizează valiza, trimite numărul de referință.
• Compania aeriană trimite numărul de referință îndată ce localizează valiza.

The meaning stays basically the same.

The first version emphasizes the time condition first: as soon as... The second version starts with the main action: the airline sends...

Yes, a localiza literally means to locate.

In practical contexts like lost luggage, it means to find where something is or to track it down.

So compania aeriană localizează valiza means the airline has identified the suitcase’s location.

Depending on context, Romanian might also use other verbs, such as:

• găsește = finds
• identifică = identifies

But localizează is a very reasonable choice when the idea is specifically locating the bag rather than simply finding it.

Valiza means the suitcase specifically.

Bagajul means the luggage / the baggage more generally.

So:

• valiza = one suitcase
• bagajul = the luggage, baggage, or bag(s) in a broader sense

In an airline context, both can appear, but valiza is more specific and concrete. If the sentence is about one particular suitcase, valiza makes perfect sense.