B737 flight crew reported landing with flaps up after flaps would not extend for landing.

Attributes
ACN	1330148
Time
Date	201602
Local Time Of Day	1201-1800
Place
Locale Reference	DEN.Airport
State Reference	CO
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	Trailing Edge Flap
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 211 Flight Crew Total 7401 Flight Crew Type 1855
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 41
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

Could not extend flaps with normal system when making a visual daytime approach. Went around to run checklist. Could not get flaps to extend with alt flaps so we did a no-flap landing using the flight manual procedures. Captain made the landing with 188 knot approach. No problems stopping and normal taxi in.

Original NASA ASRS Text

Title: B737 flight crew reported landing with flaps up after flaps would not extend for landing.

Narrative: Could not extend flaps with normal system when making a visual daytime approach. Went around to run checklist. Could not get flaps to extend with alt flaps so we did a no-flap landing using the flight manual procedures. Captain made the landing with 188 knot approach. No problems stopping and normal taxi in.

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.