Kafa lambası kaçış yolunu göstermekle kalmayıp kampçı ünitesini aydınlattı.

It is a common Turkish pattern meaning not only showing ... but also ....

The structure is:

verb stem + -mekle kalmayıp + another verb

So here:

• göstermekle kalmayıp = not only showing / not just showing
• aydınlattı = it illuminated

Together, the sentence means something like:

The headlamp not only showed the escape route, but also illuminated the camper unit.

Literally, kalmamak is not to remain / not to stop, so the idea is it didn’t stop at showing the route; it also illuminated something else.

Because Turkish often builds that meaning directly into the grammar.

In English, you say:

• not only X, but also Y

In Turkish, this can be expressed with:

• X yapmakla kalmayıp Y yapmak
• or X yapmakla kalmadı, Y de yaptı

So göstermekle kalmayıp ... aydınlattı already contains the idea of not only ... but also ....

A word like de could appear in another version, but it is not required here.

Because it is the specific direct object of the verb göstermek.

Base form:

• kaçış yolu = escape route

In the sentence, it means the escape route, not just an escape route, so Turkish uses the accusative.

But there is an extra detail: kaçış yolu is a noun compound, and the second noun already has the compound ending -u:

• kaçış yol-u

When a compound like this takes the accusative, Turkish adds -nı / -ni / -nu / -nü:

• kaçış yolu → kaçış yolunu

So kaçış yolunu göstermek = to show the escape route.

For the same reason as kaçış yolunu: it is also a specific direct object, and it is also a noun compound.

Base form:

• kampçı ünitesi

This structure works like:

• kampçı
  • ünite-si

The second noun gets the compound marker -si.

Then, because it is the specific thing being illuminated, it takes the accusative:

• kampçı ünitesi → kampçı ünitesini

So:

• kampçı ünitesini aydınlattı = it illuminated the camper unit

Because kafa lambası is also a noun compound.

In Turkish, when one noun modifies another noun, the second noun often takes -(s)ı / -(s)i / -(s)u / -(s)ü.

So:

• kafa = head
• lamba = lamp
• kafa lambası = headlamp

This does not necessarily mean real possession, like the lamp of the head in a literal English sense. It is just the normal Turkish way to form many noun compounds.

Other examples:

• diş fırçası = toothbrush
• okul kapısı = school door

Aydınlattı is in the simple past tense.

It comes from:

• aydınlatmak = to illuminate
• aydınlattı = it illuminated

It is the only fully conjugated verb because göstermekle kalmayıp is not a complete finite verb phrase by itself here. It is a linked, non-finite structure that connects to the main verb.

So the final verb:

• gives the tense
• gives the person/number
• completes the sentence

That is very common in Turkish: earlier verbs can appear in connecting forms, while the last verb carries the main tense.

In this sentence, it is best to learn göstermekle kalmayıp as part of a set expression.

Technically, göstermekle is built from:

• göstermek = to show
• plus -le

In many cases, -makla / -mekle can have meanings like by doing or can be part of fixed patterns. Here, it is part of the expression:

• V-mekle kalmamak

This whole pattern means:

• not to stop at doing V
• not only do V

So instead of trying to translate -le by itself as with, it is more useful to understand the whole chunk:

• göstermekle kalmayıp = not only showing

Because Turkish usually prefers Subject–Object–Verb word order.

Here the basic order is:

• Kafa lambası = subject
• kaçış yolunu = object of show
• kampçı ünitesini = object of illuminate
• aydınlattı = main verb at the end

So the sentence follows a very normal Turkish pattern: the main finite verb comes last.

English speakers often notice this immediately, because English usually puts the verb much earlier.

Yes. A very common alternative would be:

Kafa lambası kaçış yolunu göstermekle kalmadı, kampçı ünitesini de aydınlattı.

This version may feel easier to parse because:

• kalmadı is a fully conjugated past form
• de clearly adds the meaning also

So both versions mean roughly the same thing:

• göstermekle kalmayıp ... aydınlattı
• göstermekle kalmadı, ... de aydınlattı

The version in your sentence is a little more compact and slightly more written in style, but both are natural Turkish patterns.