Was there an A7 back in the day? Indeed was there an A9 which is now 109?
IIRC there were either 4 or 5 Alpha stands on the NW side of Pier 4, and they were certainly numbered sequentially (odd numbers, obviously) starting with A1 where the Shuttle gateroom was.
So definitely an A7, maybe an A9 - it was a long time ago !