A B757-200 experienced a trailing edge flap asymmetry during approach. Aircraft reacted adversely to...

Attributes
ACN	697056
Time
Date	200605
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 3000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	697056
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	697057
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : eicas
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem flight crew : landed in emergency condition
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

On approach when selecting flaps 1; we received a te flaps disagree EICAS message and te flaps light. First officer was flying and I referenced the QRH. While performing alternate flap extension to 5 in accordance with the QRH; the aircraft shuddered and the first officer indicated that the flight controls felt sluggish. Since it seemed we might have more that just a trailing edge asymmetry; I opted to stop the QRH at that point; ie; not continue extending flaps alternately to 20. We declared a emergency with tower and landed uneventfully with flaps 5. After landing we got master warning and master caution lights along with an autoplt disconnect message. Pressing the autoplt disconnect button on the yoke cleared that message. Following rollout; we cancelled the emergency with tower as we cleared the runway. Taxied to parking and wrote up the facts.

Original NASA ASRS Text

Title: A B757-200 EXPERIENCED A TRAILING EDGE FLAP ASYMMETRY DURING APCH. ACFT REACTED ADVERSELY TO ALTERNATE FLAP EXTENSION. EMERGENCY DECLARED AND FLT LANDED WITH FLAPS 5.

Narrative: ON APCH WHEN SELECTING FLAPS 1; WE RECEIVED A TE FLAPS DISAGREE EICAS MESSAGE AND TE FLAPS LIGHT. FO WAS FLYING AND I REFERENCED THE QRH. WHILE PERFORMING ALTERNATE FLAP EXTENSION TO 5 IN ACCORDANCE WITH THE QRH; THE ACFT SHUDDERED AND THE FO INDICATED THAT THE FLT CTLS FELT SLUGGISH. SINCE IT SEEMED WE MIGHT HAVE MORE THAT JUST A TRAILING EDGE ASYMMETRY; I OPTED TO STOP THE QRH AT THAT POINT; IE; NOT CONTINUE EXTENDING FLAPS ALTERNATELY TO 20. WE DECLARED A EMER WITH TWR AND LANDED UNEVENTFULLY WITH FLAPS 5. AFTER LANDING WE GOT MASTER WARNING AND MASTER CAUTION LIGHTS ALONG WITH AN AUTOPLT DISCONNECT MESSAGE. PRESSING THE AUTOPLT DISCONNECT BUTTON ON THE YOKE CLEARED THAT MESSAGE. FOLLOWING ROLLOUT; WE CANCELLED THE EMER WITH TOWER AS WE CLEARED THE RWY. TAXIED TO PARKING AND WROTE UP THE FACTS.

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.

A B757-200 experienced a trailing edge flap asymmetry during approach. Aircraft reacted adversely to alternate flap extension. Emergency declared and flight landed with flaps 5.