Air carrier large transport experiences a GPWS warning on ILS approach inside the FAF.

Attributes
ACN	168342
Time
Date	199101
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cvg
State Reference	OH
Altitude	msl bound lower : 1600 msl bound upper : 1600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : cvg artcc : zkc
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : flight engineer
Experience	flight time last 90 days : 120 flight time total : 15000 flight time type : 4500
ASRS Report	168342
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other
Situations
Airport	other physical facility

Narrative:

Aircraft was set up on the cvg ILS 18L approach, on G/south, localizer centered. As we crossed the south bank of the ohio river over the cliffs, the GPWS issued a 'pull up' alert. All conditions were normal, and visibility was unrestricted, so no evasive action was taken. Under less than optimum WX conditions, this could prove very unnerving and would require a go around. Recommend the G/south be adjusted to prevent erroneous terrain closure alerts in the future.

Original NASA ASRS Text

Title: ACR LGT EXPERIENCES A GPWS WARNING ON ILS APCH INSIDE THE FAF.

Narrative: ACFT WAS SET UP ON THE CVG ILS 18L APCH, ON G/S, LOC CENTERED. AS WE CROSSED THE S BANK OF THE OHIO RIVER OVER THE CLIFFS, THE GPWS ISSUED A 'PULL UP' ALERT. ALL CONDITIONS WERE NORMAL, AND VISIBILITY WAS UNRESTRICTED, SO NO EVASIVE ACTION WAS TAKEN. UNDER LESS THAN OPTIMUM WX CONDITIONS, THIS COULD PROVE VERY UNNERVING AND WOULD REQUIRE A GAR. RECOMMEND THE G/S BE ADJUSTED TO PREVENT ERRONEOUS TERRAIN CLOSURE ALERTS IN THE FUTURE.

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.