An lr-40 captain reported receiving a GPWS terrain warning while being vectored for arrival at btv. ...

Attributes
ACN	982884
Time
Date	201112
Local Time Of Day	0601-1200
Place
Locale Reference	BTV.TRACON
State Reference	VT
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Learjet 40
Operating Under FAR Part	Part 135
Flight Phase	Initial Approach
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 75 Flight Crew Total 8250 Flight Crew Type 400
Events
Anomaly	ATC Issue All Types Inflight Event / Encounter CFTT / CFIT

Narrative:

We were getting vectors for the ILS runway 33 at btv. At an altitude of 5;500 ft and a heading of 060 degrees around 17 miles DME from the ILS we had an terrain alert 2 seconds later pull up terrain alert. We initiated the command by the GPWS and climbed to 6;600 ft where the warning ceased. ATC was contacted and informed of the situation and we were told there was no threat of terrain. We continue and executed the ILS approach and landed safely. The weather was IMC and there was no way of knowing how close we were to the terrain so we acted per the commands of the GPWS. We also noticed the MSA on the approach plate to the southeast of the btv VOR was 5;900 ft and we were below that. We are not 100% sure the threat was there; but we do think we were vectored too far out (approximately 18.0 DME for the localizer) and there was a possible danger for the warning to activate.

Original NASA ASRS Text

Title: An LR-40 Captain reported receiving a GPWS terrain warning while being vectored for arrival at BTV. Although ATC stated there was no terrain concern the reporter has some doubts.

Narrative: We were getting vectors for the ILS Runway 33 at BTV. At an altitude of 5;500 FT and a heading of 060 degrees around 17 miles DME from the ILS we had an TERRAIN alert 2 seconds later PULL UP TERRAIN alert. We initiated the command by the GPWS and climbed to 6;600 FT where the warning ceased. ATC was contacted and informed of the situation and we were told there was no threat of terrain. We continue and executed the ILS approach and landed safely. The weather was IMC and there was no way of knowing how close we were to the terrain so we acted per the commands of the GPWS. We also noticed the MSA on the approach plate to the southeast of the BTV VOR was 5;900 FT and we were below that. We are not 100% sure the threat was there; but we do think we were vectored too far out (approximately 18.0 DME for the LOC) and there was a possible danger for the warning to activate.

Data retrieved from NASA's ASRS site as of April 2012 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.

An lr-40 captain reported receiving a GPWS terrain warning while being vectored for arrival at btv. Although ATC stated there was no terrain concern the reporter has some doubts.