Air carrier medium large transport got a flap warning from GPWS when flying a noise visual to runway...

Attributes
ACN	169468
Time
Date	199101
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : dca
State Reference	DC
Altitude	agl bound lower : 250 agl bound upper : 250
Environment
Flight Conditions	Marginal
Aircraft 1
Controlling Facilities	tower : dca
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other landing other
Route In Use	approach : visual departure : noise abatement
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time total : 16000
ASRS Report	169468
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	non adherence : published procedure non adherence : far other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

Using the roslyn approach to runway 18 at dca, saw to airport approximately 6 mi out. Followed the river to runway 18 at the fix point. Approximately 250' above the ground, received 'too low flaps' from GPWS system. A check of all system indicated normal conditions. The PNF had not positioned the flaps 3 position switch to off so the warning was normal in this case. This is a case where the latest state of the art aircraft still requires landing at reduced flaps for noise abatement, which sets the stage for these startling situations.

Original NASA ASRS Text

Title: ACR MLG GOT A FLAP WARNING FROM GPWS WHEN FLYING A NOISE VISUAL TO RWY 18 AT DCA.

Narrative: USING THE ROSLYN APCH TO RWY 18 AT DCA, SAW TO ARPT APPROX 6 MI OUT. FOLLOWED THE RIVER TO RWY 18 AT THE FIX POINT. APPROX 250' ABOVE THE GND, RECEIVED 'TOO LOW FLAPS' FROM GPWS SYS. A CHK OF ALL SYS INDICATED NORMAL CONDITIONS. THE PNF HAD NOT POSITIONED THE FLAPS 3 POS SWITCH TO OFF SO THE WARNING WAS NORMAL IN THIS CASE. THIS IS A CASE WHERE THE LATEST STATE OF THE ART ACFT STILL REQUIRES LNDG AT REDUCED FLAPS FOR NOISE ABATEMENT, WHICH SETS THE STAGE FOR THESE STARTLING SITUATIONS.

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.

Air carrier medium large transport got a flap warning from GPWS when flying a noise visual to runway 18 at dca.