Pittsburgh - The Falcons allowed three second-period goals and couldn't recover to lose 5-3 Saturday to host Robert Morris for a weekend sweep.
Air Force fell to 14-8-4, 9-5-4 in the Atlantic Hockey Association while Robert Morris moved to 8-13-3, 7-6-3.
Adam McKenzie tried to bring the Falcons back two third-period assists, to go with a first-period goal, but Robert Morris held on to a 4-3 lead and got an empty-net goal with 27 seconds left.
Chad Demers and Ben Persian scored the third-period goals for the Falcons.
Chris Truehl had 31 saves for Air Force, which dropped into fourth place behind Connecticut.
The Falcons host UConn in a key AHA series next weekend. Air Force had won five straight games before this weekend's sweep.