Possible Clues:

• Shaft allowing access to other floors
• Space flight takes one coming into sun source
• Where Steps are playing, writes a couple of lines
• Vertical space in building Rita's altered thoroughly
• Walking route between floors
• Place for flights? Primarily soaring through atmosphere successfully
• Peer intently, we're told, to see flight's location
• Flight case?
• Have a thorough look, say, for flight location
• American needs to mix effectively around communal area