F100 receive GPWS alert when turning left base at tys and execute climb.

Attributes
ACN	512068
Time
Date	200105
Day	Tue
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : tys.airport
State Reference	TN
Altitude	msl bound lower : 2600 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : tys.tracon
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 60 flight time total : 19152 flight time type : 2850
ASRS Report	512068
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	other spatial deviation
Independent Detector	aircraft equipment : gpws other flight crewa
Resolutory Action	flight crew : took evasive action
Supplementary
Problem Areas	Environmental Factor Airport
Primary Problem	Environmental Factor

Narrative:

On visual approach to runway 23L at tys, we were 4-5 mi left dogleg base to runway 23L at 2600 ft MSL when we received a GPWS warning. We had 15+ mi visibility, runway and airport in sight. We started a climb, and at 3000 ft MSL, GPWS warning stopped. The following morning, looking at arrival from the east, there are several short sleeper hills along that approach area that probably set off the GPWS.

Original NASA ASRS Text

Title: F100 RECEIVE GPWS ALERT WHEN TURNING L BASE AT TYS AND EXECUTE CLB.

Narrative: ON VISUAL APCH TO RWY 23L AT TYS, WE WERE 4-5 MI L DOGLEG BASE TO RWY 23L AT 2600 FT MSL WHEN WE RECEIVED A GPWS WARNING. WE HAD 15+ MI VISIBILITY, RWY AND ARPT IN SIGHT. WE STARTED A CLB, AND AT 3000 FT MSL, GPWS WARNING STOPPED. THE FOLLOWING MORNING, LOOKING AT ARR FROM THE E, THERE ARE SEVERAL SHORT SLEEPER HILLS ALONG THAT APCH AREA THAT PROBABLY SET OFF THE GPWS.

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.