CL60 crew receive an aural terrain warning while on a VOR 17 approach into mht.

Attributes
ACN	581089
Time
Date	200305
Day	Thu
Local Time Of Day	0001 To 0600
Place
State Reference	NH
Altitude	msl bound lower : 1200 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : mht.tracon
Operator	common carrier : air carrier
Make Model Name	Challenger CL600
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : instrument non precision arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 127 flight time total : 1221 flight time type : 123
ASRS Report	581089
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment : gpws other flight crewa other flight crewb
Resolutory Action	other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

While on vector to VOR 17 visual runway 17, utilizing VOR 17 for lateral guidance, we descended from 2000 ft. On descent to 1200 ft, we got a 'terrain, terrain, pull up' aural message twice, and I disconnected autoplt and returned to 2000 ft. We were not established on final and should not have commenced descent to 1200 ft until established inbound. My captain suggested 1200 ft and not seeing obstacles on chart, I agreed to the new altitude. I applied pressure to the yoke prior to disconnecting autoplt and this created a strong pitch up once ap disconnected. While this didn't provide any flight safety concerns, it did create passenger discomfort.

Original NASA ASRS Text

Title: CL60 CREW RECEIVE AN AURAL TERRAIN WARNING WHILE ON A VOR 17 APCH INTO MHT.

Narrative: WHILE ON VECTOR TO VOR 17 VISUAL RWY 17, UTILIZING VOR 17 FOR LATERAL GUIDANCE, WE DSNDED FROM 2000 FT. ON DSCNT TO 1200 FT, WE GOT A 'TERRAIN, TERRAIN, PULL UP' AURAL MESSAGE TWICE, AND I DISCONNECTED AUTOPLT AND RETURNED TO 2000 FT. WE WERE NOT ESTABLISHED ON FINAL AND SHOULD NOT HAVE COMMENCED DSCNT TO 1200 FT UNTIL ESTABLISHED INBOUND. MY CAPT SUGGESTED 1200 FT AND NOT SEEING OBSTACLES ON CHART, I AGREED TO THE NEW ALT. I APPLIED PRESSURE TO THE YOKE PRIOR TO DISCONNECTING AUTOPLT AND THIS CREATED A STRONG PITCH UP ONCE AP DISCONNECTED. WHILE THIS DIDN'T PROVIDE ANY FLT SAFETY CONCERNS, IT DID CREATE PAX DISCOMFORT.

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.