E120 crew had asymmetric flap lockout on departure at mry class D.

Attributes
ACN	484517
Time
Date	200009
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : mry.airport
State Reference	CA
Altitude	msl single value : 2000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : mry.tracon
Operator	common carrier : air taxi
Make Model Name	Brasilia EMB-120 All Series
Operating Under FAR Part	Part 119
Flight Phase	climbout : vacating altitude
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp pilot : multi engine
Experience	flight time last 90 days : 160 flight time total : 3900 flight time type : 2200
ASRS Report	484517
Person 2
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : declared emergency flight crew : landed in emergency condition flight crew : diverted to another airport none taken : detected after the fact other
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

After takeoff from the monterey airport (mry), when we retracted the flaps from 15 degrees to 0 degrees, we encountered flap asymmetry. The aircraft was controllable. We declared an emergency, landed back at monterey airport. Callback conversation with reporter revealed the following information: captain indicated the aircraft asymmetry protection system worked as advertised. It stopped flap motion as soon as asymmetry was detected. The aircraft had a roll, but was easily controled. The aircraft was ferried to the air carrier maintenance base for repair. He does not know what problems were found.

Original NASA ASRS Text

Title: E120 CREW HAD ASYMMETRIC FLAP LOCKOUT ON DEP AT MRY CLASS D.

Narrative: AFTER TKOF FROM THE MONTEREY ARPT (MRY), WHEN WE RETRACTED THE FLAPS FROM 15 DEGS TO 0 DEGS, WE ENCOUNTERED FLAP ASYMMETRY. THE ACFT WAS CONTROLLABLE. WE DECLARED AN EMER, LANDED BACK AT MONTEREY ARPT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: CAPT INDICATED THE ACFT ASYMMETRY PROTECTION SYS WORKED AS ADVERTISED. IT STOPPED FLAP MOTION AS SOON AS ASYMMETRY WAS DETECTED. THE ACFT HAD A ROLL, BUT WAS EASILY CTLED. THE ACFT WAS FERRIED TO THE ACR MAINT BASE FOR REPAIR. HE DOES NOT KNOW WHAT PROBS WERE FOUND.

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.