<< >> NASA ASRS Report 604084, January 2004

A B737-800 on final approach at 2000 ft declared an emergency and executed a missed approach due to trailing edge flaps jammed at 16 units.

Attributes
ACN	604084
Time
Date	200401
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 2000
Environment
Light	Night
Aircraft 1
Controlling Facilities	tower : zzz.tower
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
ASRS Report	604084
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	804085
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : t.e. flap malfunction other flight crewa other flight crewb
Resolutory Action	flight crew : overcame equipment problem flight crew : executed missed approach
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

On approach to runway 1 at ZZZ, flaps jammed at 16 degrees when flap handle was selected to 40 degrees. Executed missed approach and ran trailing edge flaps disagree procedure in QRH. Declared emergency due to flight control malfunction and landed at ZZZ uneventfully. Callback conversation with reporter revealed the following information: the reporter stated the cause of failure in the trailing edge flap system is unknown as maintenance has released no information on the incident.

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Original NASA ASRS Text

Title: A B737-800 ON FINAL APCH AT 2000 FT DECLARED AN EMER AND EXECUTED A MISSED APCH DUE TO TRAILING EDGE FLAPS JAMMED AT 16 UNITS.

Narrative: ON APCH TO RWY 1 AT ZZZ, FLAPS JAMMED AT 16 DEGS WHEN FLAP HANDLE WAS SELECTED TO 40 DEGS. EXECUTED MISSED APCH AND RAN TRAILING EDGE FLAPS DISAGREE PROC IN QRH. DECLARED EMER DUE TO FLT CTL MALFUNCTION AND LANDED AT ZZZ UNEVENTFULLY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE CAUSE OF FAILURE IN THE TRAILING EDGE FLAP SYS IS UNKNOWN AS MAINT HAS RELEASED NO INFO ON THE INCIDENT.

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.