La tripulación fue muy amable, y una auxiliar de vuelo me trajo agua cuando me mareé.

Because tripulación is a collective noun in Spanish, like crew in English. It refers to a group, but grammatically it is singular.

So Spanish says:

• La tripulación fue muy amable. = The crew was very kind.

That is why the verb is fue and the adjective is amable in the singular.

If you wanted to focus on the individual people, you could say:

• Los miembros de la tripulación fueron muy amables. = The crew members were very kind.

Both are possible in Spanish, but they suggest slightly different viewpoints.

• fue muy amable uses the preterite and presents the kindness as a completed fact in that situation, for example during that flight.
• era muy amable uses the imperfect and sounds more descriptive, like background information or a general characteristic.

In this sentence, fue muy amable fits well because the speaker is talking about a specific experience and a specific act of kindness.

So:

• La tripulación fue muy amable = The crew was very kind on that occasion.
• La tripulación era muy amable = more like The crew was very kind/nice as a description.

Because tripulación is singular, the adjective agrees with it in the singular:

• la tripulación → singular
• amable → singular

Also, amable has the same form for masculine and feminine in the singular:

• un hombre amable
• una mujer amable

The plural is amables:

• personas amables
• miembros amables

Yes. Auxiliar de vuelo means flight attendant.

In Spain, this is a normal and fairly neutral term. You may also hear:

• azafata for a female flight attendant
• azafato for a male flight attendant

But auxiliar de vuelo is often preferred because it sounds more formal and job-based, similar to flight attendant in English.

Because the speaker is referring to one female flight attendant.

• una = a/an, feminine singular
• auxiliar can refer to a male or female assistant depending on context
• here, una shows the person is female

If it were male, it would be:

• un auxiliar de vuelo

Me means to me.

So:

• una auxiliar de vuelo me trajo agua = a flight attendant brought me water

Spanish often uses an indirect object pronoun where English uses to + pronoun.

Compare:

• Me trajo agua. = She brought me water.
• Le trajo agua a mi madre. = She brought water to my mother.

So me is not reflexive here. It simply means to me.

Because traer is irregular in the preterite.

Its preterite forms are:

• traje = I brought
• trajiste = you brought
• trajo = he/she/it brought
• trajimos = we brought
• trajisteis = you all brought
• trajeron = they brought

So in the sentence:

• una auxiliar de vuelo me trajo agua = a flight attendant brought me water

This is just a form you need to learn as an irregular preterite.

Because Spanish often uses no article when talking about an uncountable substance in a general sense.

So:

• me trajo agua = she brought me water

This is perfectly natural.

If you add an article, it changes the feel:

• me trajo el agua = she brought me the water
• me trajo un agua = less common here; it could mean a water, for example one bottle/glass in certain contexts

So the version in the sentence is the most natural one.

Me mareé means I got dizzy, I felt faint, or I got motion sick, depending on context.

The verb is marearse, which often means:

• to feel dizzy
• to get nauseous
• to get motion sickness

On a plane, me mareé often suggests I felt sick/dizzy from the flight.

Yes, marearse is commonly used as a reflexive/pronominal verb.

• marear can mean to make someone dizzy or even to annoy/bother
• marearse means to become dizzy / to feel sick

So:

• Me mareé. = I got dizzy / I felt sick.
• El movimiento me mareó. = The movement made me dizzy.

The me here is part of the verb marearse.

Because the speaker is referring to a specific moment or event: they became dizzy during the flight.

• cuando me mareé = when I got dizzy
• cuando me mareaba = when I used to get dizzy or when I was getting dizzy depending on context

In this sentence, the preterite works well because it marks the moment that triggered the action:

• first, the speaker got dizzy
• then, the flight attendant brought water

So the preterite gives a clear sequence of events.

Both are possible, but they mean different things.

• cuando me mareé = when I got dizzy
  This focuses on the moment the dizziness started.
• cuando estaba mareado/a = when I was dizzy
  This describes the state of already being dizzy.

The original sentence highlights the event that caused the response from the flight attendant, so cuando me mareé is very natural.

Yes. Amable is a broad word that often means:

• kind
• nice
• friendly
• courteous

The exact English translation depends on context.

In this sentence, very kind or very nice both work well:

• La tripulación fue muy amable. = The crew was very kind / very nice.

Because Spanish normally uses the object pronoun before the conjugated verb:

• me trajo agua

That is the standard order.

You can say a mí for emphasis, but then you usually keep me as well:

• Una auxiliar de vuelo me trajo agua a mí.

That sounds emphatic, like to me in particular. Without emphasis, me trajo agua is the natural choice.

Cuando means when and introduces a time clause.

Here it connects the two ideas:

• una auxiliar de vuelo me trajo agua
• cuando me mareé

So the meaning is:

• A flight attendant brought me water when I got dizzy.

It tells you when the main action happened.

The accent mark shows the stress and also helps distinguish the form.

• mareé = I got dizzy / I made dizzy depending on the verb used
• it is the first person singular preterite ending for -ar verbs: -é

Compare:

• hablé
• llamé
• mareé

So the accent is a normal part of the preterite ending.