Updated 2/8/18 at 12:30 p.m.
Unalaska is facing its third day of flight cancellations.
On Tuesday, the problem was weather. But since then, the trouble has stemmed from a navigational beacon at the airport.
"For whatever reason, that piece of equipment expired before it was re-certified," said Missy Roberts of PenAir, Unalaska’s only carrier with flights to and from Anchorage.