The FAA says it has temporarily has directed planes to take off toward the west from Phoenix's Sky Harbor.
Agency spokesman Ian Gregor the order comes largely because of construction of the airport's Sky Train rail line.
Planes typically depart toward the east overnight and morning, and toward the west in the afternoon. But because of the construction, the FAA closed off one of the airport's three taxiways six weeks ago.
The change is giving Tempe residents some relief from the noise, but at the same time it's giving some Phoenix residents an earful.
The rumbles and roars of planes are constant with nearly 1,200 aircraft coming and going daily.
The westbound takeoff pattern is expected to continue until October or November.