According to the Elemental Evil Player's Companion, a player can be an Aarakocra.
According to the Monster Manual (p. 12), five Aarakocra can perform a ritual and summon an air elemental:
Summoning Air Elementals
Five aarakocra within 30 feet of each other can magically summon an air elemental. Each of the five must use its action and movement on three consecutive turns to perform an aerial dance and must maintain concentration while doing so (as if concentrating on a spell). When all five have finished their third turn of the dance, the elemental appears in an unoccupied space within 60 feet of them. It is friendly toward them and obeys their spoken commands. It remains for 1 hour, until it or all its summoners die, or until any of its summoners dismisses it as a bonus action. A summoner can't perform the dance again until it finishes a short rest. When the elemental returns to the Elemental Plane of Air, any aarakocra within 5 feet of it can return with it.
I was wondering if five Aarakocras PC could summon it RAW/RAI. In no place is it specifically said that a PC can't summon it, nor says they can do it.
In case the answer is no, I was wondering if it would be balance-breaking to allow it. What unexpected side effect could that produce?