<< >> NASA ASRS Report 360733, February 1997

Flight crew of an ATR72 responded twice to a GPWS alert during descent into avl airport area. Even though ATC was assigning their altitude and vectors, they took appropriate evasive action each time an alert was received.

Attributes
ACN	360733
Time
Date	199702
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : sug airport : avl
State Reference	NC
Altitude	msl bound lower : 4600 msl bound upper : 8000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : avl
Operator	common carrier : air carrier
Make Model Name	ATR 72
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	arrival other enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 15000 flight time type : 500
ASRS Report	360733
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	inflight encounter : weather other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : exited adverse environment flight crew : took evasive action flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Encountered occasional moderate rime icing at 15000 ft MSL. Requested lower altitude and was cleared to 8000 ft. At approximately 30 DME received terrain warning from GPWS. Executed rapid climb until warning ceased (IMC conditions). Later while being vectored for visual approach on east side of airport at 4600 ft MSL (marginal visibility), received terrain warning from GPWS. Executed climb until warning ceased (6000 ft MSL). ATC was advised as soon as possible and to my knowledge there was no conflict. This seems to be a common occurrence at this airport.

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Original NASA ASRS Text

Title: FLC OF AN ATR72 RESPONDED TWICE TO A GPWS ALERT DURING DSCNT INTO AVL ARPT AREA. EVEN THOUGH ATC WAS ASSIGNING THEIR ALT AND VECTORS, THEY TOOK APPROPRIATE EVASIVE ACTION EACH TIME AN ALERT WAS RECEIVED.

Narrative: ENCOUNTERED OCCASIONAL MODERATE RIME ICING AT 15000 FT MSL. REQUESTED LOWER ALT AND WAS CLRED TO 8000 FT. AT APPROX 30 DME RECEIVED TERRAIN WARNING FROM GPWS. EXECUTED RAPID CLB UNTIL WARNING CEASED (IMC CONDITIONS). LATER WHILE BEING VECTORED FOR VISUAL APCH ON E SIDE OF ARPT AT 4600 FT MSL (MARGINAL VISIBILITY), RECEIVED TERRAIN WARNING FROM GPWS. EXECUTED CLB UNTIL WARNING CEASED (6000 FT MSL). ATC WAS ADVISED ASAP AND TO MY KNOWLEDGE THERE WAS NO CONFLICT. THIS SEEMS TO BE A COMMON OCCURRENCE AT THIS ARPT.

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.