Air carrier on descent has alert light for leading edge slat asymmetrical light activate.

Attributes
ACN	324607
Time
Date	199601
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pdx
State Reference	OR
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : pdx
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : atp pilot : instrument
Experience	flight time last 90 days : 125 flight time total : 10000 flight time type : 85
ASRS Report	324607
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

5 mins before descent 'leading edge slat asymmetrical' and 'leading edge' amber light came on. Our system maintenance said 'everything should work normally.' early on high downwind, attempted flaps to 1 degree then 5 degrees. No leading or trailing devices. Declared an emergency, called for fire equipment. Called maintenance, prepared cabin for evacuate/evacuation. On landing, 15 mi on final, using alternate procedures, got 20 degrees trailing flaps. Landed reference 20 + 20 KTS. Uneventful landing and taxi in. First officer and flight attendants did good job. Used 'off line' jump seat rider for some tasks.

Original NASA ASRS Text

Title: ACR ON DSCNT HAS ALERT LIGHT FOR LEADING EDGE SLAT ASYMMETRICAL LIGHT ACTIVATE.

Narrative: 5 MINS BEFORE DSCNT 'LEADING EDGE SLAT ASYMMETRICAL' AND 'LEADING EDGE' AMBER LIGHT CAME ON. OUR SYS MAINT SAID 'EVERYTHING SHOULD WORK NORMALLY.' EARLY ON HIGH DOWNWIND, ATTEMPTED FLAPS TO 1 DEG THEN 5 DEGS. NO LEADING OR TRAILING DEVICES. DECLARED AN EMER, CALLED FOR FIRE EQUIP. CALLED MAINT, PREPARED CABIN FOR EVAC. ON LNDG, 15 MI ON FINAL, USING ALTERNATE PROCS, GOT 20 DEGS TRAILING FLAPS. LANDED REF 20 + 20 KTS. UNEVENTFUL LNDG AND TAXI IN. FO AND FLT ATTENDANTS DID GOOD JOB. USED 'OFF LINE' JUMP SEAT RIDER FOR SOME TASKS.

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.