B737-300 crew had an egpws 'terrain terrain' warning while flying a non precision approach at ict.

Attributes
ACN	523142
Time
Date	200108
Day	Wed
Place
Locale Reference	airport : ict.airport
State Reference	KS
Altitude	msl single value : 1200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ict.tracon
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	ils other localizer other
Flight Phase	descent : approach
Route In Use	approach : visual approach : instrument non precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain observation : company check pilot oversight : pic
Qualification	pilot : atp
Experience	flight time type : 2646
ASRS Report	523142
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	523669
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	aircraft equipment : gpws other flight crewa other flight crewb
Resolutory Action	flight crew : took precautionary avoidance action none taken : detected after the fact other
Consequence	other
Supplementary
Problem Areas	FAA Aircraft
Primary Problem	Aircraft

Narrative:

Localizer back course approach. Ground wind less than 10 KTS. 40 degree flap. Practice back course with visual approach clearance. Airport and VASI in sight throughout. FAF at 3000 and 121 KTS stable. Descent at 1200 FPM towards 1700 MDA. Swallowed to 1000 FPM due to 23 KTS headwind and minimize time at MDA. Made 500 ft call, aircraft leveled at 1700 MSL. Egpws gave 'terrain, terrain,' did pull up. 'Pull-up, pull-up,' sounded during the climb. No obstacles insight. Climbed to VASI and did normal landing. Verified all altimeters same and setting correct with tower. Cannot account for egpws warning.

Original NASA ASRS Text

Title: B737-300 CREW HAD AN EGPWS 'TERRAIN TERRAIN' WARNING WHILE FLYING A NON PRECISION APCH AT ICT.

Narrative: LOC BACK COURSE APCH. GND WIND LESS THAN 10 KTS. 40 DEG FLAP. PRACTICE BACK COURSE WITH VISUAL APCH CLRNC. ARPT AND VASI IN SIGHT THROUGHOUT. FAF AT 3000 AND 121 KTS STABLE. DESCENT AT 1200 FPM TOWARDS 1700 MDA. SWALLOWED TO 1000 FPM DUE TO 23 KTS HEADWIND AND MINIMIZE TIME AT MDA. MADE 500 FT CALL, ACFT LEVELED AT 1700 MSL. EGPWS GAVE 'TERRAIN, TERRAIN,' DID PULL UP. 'PULL-UP, PULL-UP,' SOUNDED DURING THE CLIMB. NO OBSTACLES INSIGHT. CLIMBED TO VASI AND DID NORMAL LNDG. VERIFIED ALL ALTIMETERS SAME AND SETTING CORRECT WITH TWR. CANNOT ACCOUNT FOR EGPWS WARNING.

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.