<< >> NASA ASRS Report 642178, December 2004

A B737-200 on takeoff climb at 3000 ft declared an emergency and diverted due to flap asymmetrical shutoff. Caused by faulty flap position indicator.

Attributes
ACN	642178
Time
Date	200412
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzz1.artcc tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 65 flight time total : 6400 flight time type : 2400
ASRS Report	642178
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : flap position indicator other flight crewa other flight crewb
Resolutory Action	aircraft : equipment problem dissipated controller : provided flight assist flight crew : diverted to another airport flight crew : declared emergency
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

We departed ZZZ as planned. When retracting flaps from 1 degree to up, the right trailing edge flap indicator remained at 1 degree and the left indicator went to up position. We declared an emergency and ran the appropriate checklist. While discussing our options the indicator went to up position on its own. We returned to ZZZ1 and landed uneventfully. Maintenance changed the flap position indicator and operations checked ok.

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Original NASA ASRS Text

Title: A B737-200 ON TKOF CLB AT 3000 FT DECLARED AN EMER AND DIVERTED DUE TO FLAP ASYMMETRICAL SHUTOFF. CAUSED BY FAULTY FLAP POS INDICATOR.

Narrative: WE DEPARTED ZZZ AS PLANNED. WHEN RETRACTING FLAPS FROM 1 DEG TO UP, THE R TRAILING EDGE FLAP INDICATOR REMAINED AT 1 DEG AND THE L INDICATOR WENT TO UP POS. WE DECLARED AN EMER AND RAN THE APPROPRIATE CHKLIST. WHILE DISCUSSING OUR OPTIONS THE INDICATOR WENT TO UP POS ON ITS OWN. WE RETURNED TO ZZZ1 AND LANDED UNEVENTFULLY. MAINT CHANGED THE FLAP POS INDICATOR AND OPS CHKED OK.

Data retrieved from NASA's ASRS site as of July 2007 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.