<< >> NASA ASRS Report 520199, August 2001

A B737-300 on approach at 5000 ft declared an emergency due to flap asymmetrical shutoff caused by the flap position indicator.

Attributes
ACN	520199
Time
Date	200108
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ord.airport
State Reference	IL
Altitude	msl single value : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : c90.tracon
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : multi engine pilot : instrument
Experience	flight time last 90 days : 150 flight time total : 10000 flight time type : 800
ASRS Report	520199
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : flap position indication other flight crewa other flight crewb
Resolutory Action	flight crew : declared emergency
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

On vectors for final approach to runway 4R at ord. Flap asymmetry occurred at 1 1/2 degrees flaps with 1 indicator at 1 degree, the other at 1 1/2 degrees. Ran QRH procedure, planned for flaps 1 degree approach and landing to runway 9R which is a longer runway. So declared emergency due to traffic and sequencing at ord as well as higher landing and touchdown speeds. Completed QRH, contacted dispatcher, briefed flight attendants and passenger. Flew flaps 1 departure approach and landing. Touchdown normal. Nothing abnormal noted by ground personnel. Canceled emergency. Completed logbook entry and secured aircraft.

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Original NASA ASRS Text

Title: A B737-300 ON APCH AT 5000 FT DECLARED AN EMER DUE TO FLAP ASYMMETRICAL SHUTOFF CAUSED BY THE FLAP POS INDICATOR.

Narrative: ON VECTORS FOR FINAL APCH TO RWY 4R AT ORD. FLAP ASYMMETRY OCCURRED AT 1 1/2 DEGS FLAPS WITH 1 INDICATOR AT 1 DEG, THE OTHER AT 1 1/2 DEGS. RAN QRH PROC, PLANNED FOR FLAPS 1 DEG APCH AND LNDG TO RWY 9R WHICH IS A LONGER RWY. SO DECLARED EMER DUE TO TFC AND SEQUENCING AT ORD AS WELL AS HIGHER LNDG AND TOUCHDOWN SPDS. COMPLETED QRH, CONTACTED DISPATCHER, BRIEFED FLT ATTENDANTS AND PAX. FLEW FLAPS 1 DEP APCH AND LNDG. TOUCHDOWN NORMAL. NOTHING ABNORMAL NOTED BY GND PERSONNEL. CANCELED EMER. COMPLETED LOGBOOK ENTRY AND SECURED ACFT.

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.