Complex sentence: When Grace hears that the girls want to be on the flight deck taking pictures of her jet taking off, she refuses, telling them that the flight deck is a restricted area due to safety regulations and they can watch the airshow only from Vulture's Row.
Split into simpler sentences: When Grace hears that the girls want to be on the flight deck taking pictures of her jet taking off, she refuses, telling them that the flight deck is a restricted area due to safety regulations. Grace tells them they can watch the airshow only from Vulture's Row.