B737 captain reported a trailing edge flap issue which limited flap extension to 15 degrees.

Narrative:

During final approach to ZZZ; flaps failed to extend after passing flap position 2. Indicator showed flaps stuck between flap position 2 and 5 while flap handle was extended to position 15. Go-around initiated and flap retraction to position 1 attempted; but flaps would not move in either direction. Holding instructions were given to work problem and coordinate with dispatch and [maintenance control]. QRH checklist followed and alternate flap extension procedure followed which allowed flap to extend to position 15. Approximately 15 minutes were spent in holding before we were ready to initiate approach for landing. Visual approach approved to ZZZ. Weather was VMC and visibility greater than 10 nm below 10;000 ft MSL. Approach; landing and rollout was uneventful. Fire chief inspected aircraft for possible damage or fire condition before allowing taxi to parking gate. Taxi to gate and engine shutdown/parking was also uneventful.

Original NASA ASRS Text

Title: B737 Captain reported a trailing edge flap issue which limited flap extension to 15 degrees.

Narrative: During final approach to ZZZ; flaps failed to extend after passing Flap Position 2. Indicator showed flaps stuck between Flap position 2 and 5 while flap handle was extended to Position 15. Go-around initiated and flap retraction to Position 1 attempted; but flaps would not move in either direction. Holding instructions were given to work problem and coordinate with Dispatch and [maintenance control]. QRH checklist followed and alternate flap extension procedure followed which allowed flap to extend to Position 15. Approximately 15 minutes were spent in holding before we were ready to initiate approach for landing. Visual approach approved to ZZZ. Weather was VMC and visibility greater than 10 nm below 10;000 ft MSL. Approach; landing and rollout was uneventful. Fire Chief inspected aircraft for possible damage or fire condition before allowing taxi to parking gate. Taxi to gate and engine shutdown/parking was also uneventful.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1306438
Time
Date	201510
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Component
Aircraft Component	Trailing Edge Flap
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 135 Flight Crew Type 769
Events
Anomaly	Aircraft Equipment Problem Less Severe