B757 has split trailing edge flap indication when flaps extended.

Attributes
ACN	348033
Time
Date	199609
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : yvr
State Reference	BC
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : yvr
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	348033
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	none taken : unable
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

On base vectors for approach to runway 26L, while extending flaps to position #1, received EICAS alert message, trailing edge flaps disagree. We requested vectors to maneuver while running checklist. First officer leg so I directed that he fly and communicate with ATC while I ran checklist. Used procedure in operations manual vol 1/emergency/abnormal section, flight C section page 3. Extended flaps to 20 degrees for landing using alternate system according to procedure. After procedure complete, decided to request precautionary crash fire rescue equipment standby. Made PA and notified #1 flight attendant. Normal landing and left flaps to 20 degrees for taxi for maintenance action.

Original NASA ASRS Text

Title: B757 HAS SPLIT TRAILING EDGE FLAP INDICATION WHEN FLAPS EXTENDED.

Narrative: ON BASE VECTORS FOR APCH TO RWY 26L, WHILE EXTENDING FLAPS TO POS #1, RECEIVED EICAS ALERT MESSAGE, TRAILING EDGE FLAPS DISAGREE. WE REQUESTED VECTORS TO MANEUVER WHILE RUNNING CHKLIST. FO LEG SO I DIRECTED THAT HE FLY AND COMMUNICATE WITH ATC WHILE I RAN CHKLIST. USED PROC IN OPS MANUAL VOL 1/EMER/ABNORMAL SECTION, FLT C SECTION PAGE 3. EXTENDED FLAPS TO 20 DEGS FOR LNDG USING ALTERNATE SYS ACCORDING TO PROC. AFTER PROC COMPLETE, DECIDED TO REQUEST PRECAUTIONARY CFR STANDBY. MADE PA AND NOTIFIED #1 FLT ATTENDANT. NORMAL LNDG AND LEFT FLAPS TO 20 DEGS FOR TAXI FOR MAINT ACTION.

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.