The pilots of a B757 experienced a lead edge slat disagree problem on approach. After performing the...

Narrative:

When selecting flaps 1 on approach to ZZZ the le slat disagree message appeared. The flap indicator showed less than flaps 1. We asked approach control for delaying vectors or a hold; so that we could do the checklists. We followed the QRH procedures which led us to a flap 20 landing with a vref of vref 30 + 30 KTS. Due to this high speed landing I declared an emergency. We finished the le slar asym checklist and the non-normal landing procedures and continued the approach. Landing was normal and passengers were debriefed as to the delay and the emergency vehicles. There had been two previous write-ups in the logbook for this aircraft for the same issue. The aircraft had been flown about 8 flights since the last repair for this issue; with no problems.

Original NASA ASRS Text

Title: The pilots of a B757 experienced a Lead Edge Slat Disagree problem on approach. After performing the associated checklist; they completed a successful landing.

Narrative: When selecting Flaps 1 on approach to ZZZ the LE SLAT DISAGREE message appeared. The flap indicator showed less than Flaps 1. We asked Approach Control for delaying vectors or a hold; so that we could do the checklists. We followed the QRH procedures which led us to a Flap 20 landing with a VREF of VREF 30 + 30 KTS. Due to this high speed landing I declared an emergency. We finished the LE SLAR ASYM checklist and the non-normal landing procedures and continued the approach. Landing was normal and passengers were debriefed as to the delay and the emergency vehicles. There had been two previous write-ups in the logbook for this aircraft for the same issue. The aircraft had been flown about 8 flights since the last repair for this issue; with no problems.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1100492
Time
Date	201307
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZZ.Airport
State Reference	FO
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	Flap/Slat Control System
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Flying
Events
Anomaly	Aircraft Equipment Problem Critical

The pilots of a B757 experienced a lead edge slat disagree problem on approach. After performing the associated checklist; they completed a successful landing.