Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 198; Flight Crew Type 5684
Aircraft Equipment Problem Less Severe
General Maintenance Action
Aircraft
On approach; flaps moved normally to position 15.  When we attempted to select flaps 30; flaps stayed at position 15.  We reselected 15 and then reattempted to select a higher flap setting.  The flaps stayed at position 15.We briefly discussed a go-around but decided the best course of action was to land as the airplane was stable and in an approved landing configuration.  We were familiar with landing distances from our training and knew that 10;800 feet of dry runway was adequate.I used emergency authority to reselect flaps 15; set flaps 15 ref and target speed; and to set the flap inhibit switch to inhibit.We landed normally and wrote the airplane up on arrival at the gate.
B737 Captain reported continuing approach to a normal landing after noting trailing edge flaps would not extend beyond position 15.