<< >> NASA ASRS Report 688441, February 2006

B737 flight crew has flap malfunction during initial approach to landing. Declares emergency; completes emergency procedures and lands.

Attributes
ACN	688441
Time
Date	200602
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : zzz.tracon
State Reference	US
Altitude	msl single value : 3000
Environment
Flight Conditions	VMC
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 210 flight time total : 11000 flight time type : 5000
ASRS Report	688441
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : flap indications other flight crewa other flight crewb
Resolutory Action	flight crew : executed go around flight crew : declared emergency none taken : anomaly accepted
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

We were granted a side step from runway 30L to runway 30R for landing ZZZ. I was PF. I asked the captain for gear down and flaps 15 degrees. I noticed the flaps were still at 5 degrees when they should have been at 10 degrees. There was no asymmetry. They were frozen at exactly 5 degrees. We checked the gauge -- nothing. We tried a lower flap position -- nothing (indication or pitch change). Additionally there was no rolling tendency. We decided to execute a go around. The captain notified the company and maintenance and ran the appropriate checklists. I flew the plane and declared an emergency to be safe. We returned to runway 30L and the captain made an alternate flap landing. After a non eventful landing; the rescue team checked our brakes as a precaution; and we proceeded to the gate. I think as a crew we performed very well. At no point did we deviate from any SOP's for emergencys that we practice in the simulator. It really was a 'non eventful emergency.'

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Original NASA ASRS Text

Title: B737 FLT CREW HAS FLAP MALFUNCTION DURING INITIAL APCH TO LNDG. DECLARES EMER; COMPLETES EMER PROCS AND LANDS.

Narrative: WE WERE GRANTED A SIDE STEP FROM RWY 30L TO RWY 30R FOR LNDG ZZZ. I WAS PF. I ASKED THE CAPT FOR GEAR DOWN AND FLAPS 15 DEGS. I NOTICED THE FLAPS WERE STILL AT 5 DEGS WHEN THEY SHOULD HAVE BEEN AT 10 DEGS. THERE WAS NO ASYMMETRY. THEY WERE FROZEN AT EXACTLY 5 DEGS. WE CHKED THE GAUGE -- NOTHING. WE TRIED A LOWER FLAP POS -- NOTHING (INDICATION OR PITCH CHANGE). ADDITIONALLY THERE WAS NO ROLLING TENDENCY. WE DECIDED TO EXECUTE A GAR. THE CAPT NOTIFIED THE COMPANY AND MAINT AND RAN THE APPROPRIATE CHKLISTS. I FLEW THE PLANE AND DECLARED AN EMER TO BE SAFE. WE RETURNED TO RWY 30L AND THE CAPT MADE AN ALTERNATE FLAP LNDG. AFTER A NON EVENTFUL LNDG; THE RESCUE TEAM CHKED OUR BRAKES AS A PRECAUTION; AND WE PROCEEDED TO THE GATE. I THINK AS A CREW WE PERFORMED VERY WELL. AT NO POINT DID WE DEVIATE FROM ANY SOP'S FOR EMERS THAT WE PRACTICE IN THE SIMULATOR. IT REALLY WAS A 'NON EVENTFUL EMER.'

Data retrieved from NASA's ASRS site as of January 2009 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.