Narrative:

Arrival into ZZZ. NOTAM indicated medium braking. Dispatch also forwarded to us the landing performance info; NOTAM and pilot report of braking action good. Upon selecting flaps 1; we noticed that the left trailing edge flap stayed at 0 degrees (up) and the right trailing edge flap extended 1/2 the distance to the flaps 1 position on the flap gauge. There were no indications that the leading edge devices had extended. Requested clearance to ZZZ VOR for holding to sort out problem. Cleared 10 mile legs on 360 radial with efc our choice. Advised dispatch of problem; fuel remaining and need for runway condition at both ZZZ and alternate. Declared emergency with approach. Maintenance control joined call to get update and clarification of problem. Cabin crew advised of problem and to standby for further briefing once we had made a decision. Ran QRH to determine condition. Twice through QRH indicated trailing edge flaps up landing was probable but depended upon the response from the leading edge devices (leds) when called for. Ran our own performance figures for landing distance and were confirmed by dispatch (approximately 9000 ft required). Dispatch also forwarded runway condition reports of braking action good with mu's of 50. We paid special attention to the runway condition as we are aware that the -900 is the last jet in our fleet that you want to have experience this failure. Elected to land ZZZ. Briefed cabin crew and passengers. Requested emergency equipment standby for our arrival. Continued with QRH to see response of leds. Leds extended normally with alternate flaps switch confirming trailing edge flaps up landing procedure. Requested 20 mile final for stabilization and airspeed bleed off. Advised ATC of shallow bank limitation. Followed another aircraft to runway so that we could get updated braking action report. Early landing gear extension and completion of QRH to provide time to acclimate new handling characteristics. Selected autobrakes to 'maximum'. I requested first officer to monitor the approach with emphasis on reminding me not to flare on landing - we wanted a 'fly it on and plant it' landing. Flew it on and planted it. No other abnormal events after landing. Cause: thumbnail sketch from preliminary inspection by mechanic indicated failure of the left inboard trailing edge flap to extend.

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Original NASA ASRS Text

Title: A B737-900 Captain reported failure of trailing edge flaps to extend during approach. They declared an emergency and landed without incident.

Narrative: Arrival into ZZZ. NOTAM indicated medium braking. Dispatch also forwarded to us the landing performance info; NOTAM and pilot report of braking action good. Upon selecting flaps 1; we noticed that the left trailing edge flap stayed at 0 degrees (UP) and the right trailing edge flap extended 1/2 the distance to the flaps 1 position on the flap gauge. There were no indications that the leading edge devices had extended. Requested clearance to ZZZ VOR for holding to sort out problem. Cleared 10 mile legs on 360 radial with EFC our choice. Advised Dispatch of problem; fuel remaining and need for runway condition at both ZZZ and alternate. Declared emergency with Approach. Maintenance Control joined call to get update and clarification of problem. Cabin Crew advised of problem and to standby for further briefing once we had made a decision. Ran QRH to determine condition. Twice through QRH indicated trailing edge flaps up landing was probable but depended upon the response from the leading edge devices (LEDs) when called for. Ran our own performance figures for landing distance and were confirmed by Dispatch (approximately 9000 FT required). Dispatch also forwarded runway condition reports of braking action good with mu's of 50. We paid special attention to the runway condition as we are aware that the -900 is the last jet in our fleet that you want to have experience this failure. Elected to land ZZZ. Briefed cabin crew and passengers. Requested emergency equipment standby for our arrival. Continued with QRH to see response of LEDs. LEDs extended normally with alternate flaps switch confirming trailing edge flaps up landing procedure. Requested 20 mile final for stabilization and airspeed bleed off. Advised ATC of shallow bank limitation. Followed another aircraft to runway so that we could get updated braking action report. Early landing gear extension and completion of QRH to provide time to acclimate new handling characteristics. Selected autobrakes to 'MAX'. I requested First Officer to monitor the approach with emphasis on reminding me not to flare on landing - we wanted a 'fly it on and plant it' landing. Flew it on and planted it. No other abnormal events after landing. Cause: Thumbnail sketch from preliminary inspection by Mechanic indicated failure of the left inboard trailing edge flap to extend.

Data retrieved from NASA's ASRS site as of April 2012 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.