You might consider starting a thread in the sub-forum which includes your 16' Sport:
A new thread could be similar to the following Simple Survey thread in the Basecamp forum:
As you can see, that thread has very specific temp etc feedback for that exact BC fridge and installation.
If you do start a new thread, may I suggest that you title it something like "Sport 16' Refrigerator Fan Results," because that sub-forum lumps together a few different models/lengths. A specific ID of your model in the "headline" should also narrow the discussion nicely, as the longer length Airstreams in that sub-forum may have different floor plans and fridges, compared to yours.
Anyway, good luck with getting the information you seek. The BC Simple Survey thread is long, but a rewarding read in terms of the time and energy some users have devoted to improving their fridges, and getting Airstream to recognize a possible design defect in the location of the fridge at the front, where direct sun can beat down on its vent on hot days.