This is the 15258th most frequent Russian word.
посадочному
"Посадочному" refers to something related to "landing" or "boarding."
Here, 'посадочному' is an adjective describing 'талон' and indicating the boarding pass in its dative case, showing possession or relation.
Пассажир следовал указаниям посадочному талону.
The passenger followed the instructions on the boarding pass.
'Посадочному' is used as an adjective, describing 'агрегату' in dative case, referring to the context of a landing system or equipment.
Инженеры внесли изменения посадочному агрегату.
The engineers made changes to the landing module.
In this sentence, 'посадочному' serves as an adjective modifying 'диспетчеру' in dative case, which here refers to the dispatcher responsible for the landing operations.