King air flight crew experiences two consecutive taws alerts during two ILS 32 approaches into bbg r...

Attributes
ACN	1178373
Time
Date	201406
Local Time Of Day	1201-1800
Place
Locale Reference	BBG.Tower
State Reference	MO
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	King Air C90 E90
Operating Under FAR Part	Part 91
Flight Phase	Final Approach
Flight Plan	IFR
Component
Aircraft Component	GPWS
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 2250 Flight Crew Type 40
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

During two previous approaches; the co-captain and I had executed a missed approach due to a taws [terrain awareness warning system] warning on ILS 32 into bbg. We were completely stabilized and on profile with a normal descent rate. Approximately 400 feet above minimums; we received the taws warning and executed the missed approach per the afm and company policies and procedures. After 3 previous aircraft had successfully negotiated the ILS approach to land under 1 SM and 500 feet ovc conditions; we elected to inhibit the taws terrain feature. We landed safely and uneventfully at bbg on the third approach attempt. In hindsight; disabling the taws was not a prudent decision. While we were confident that the database may have been out of date due to the relatively recent construction of the airport (2009); we had no way of ensuring it was not other equipment that was faulty or programmed incorrectly.

Original NASA ASRS Text

Title: King Air flight crew experiences two consecutive TAWS alerts during two ILS 32 approaches into BBG resulting in go arounds. Other aircraft are successfully landing off the ILS 32 approach; so the TAWS is disabled and the third approach is successful.

Narrative: During two previous approaches; the Co-Captain and I had executed a missed approach due to a TAWS [Terrain Awareness Warning System] warning on ILS 32 into BBG. We were completely stabilized and on profile with a normal descent rate. Approximately 400 feet above minimums; we received the TAWS warning and executed the missed approach per the AFM and company policies and procedures. After 3 previous aircraft had successfully negotiated the ILS approach to land under 1 SM and 500 feet OVC conditions; we elected to inhibit the TAWS terrain feature. We landed safely and uneventfully at BBG on the third approach attempt. In hindsight; disabling the TAWS was not a prudent decision. While we were confident that the database may have been out of date due to the relatively recent construction of the airport (2009); we had no way of ensuring it was not other equipment that was faulty or programmed incorrectly.

Data retrieved from NASA's ASRS site 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.

King air flight crew experiences two consecutive taws alerts during two ILS 32 approaches into bbg resulting in go arounds. Other aircraft are successfully landing off the ILS 32 approach; so the taws is disabled and the third approach is successful.