Air carrier flight crew reported receiving what was suspected to be an erroneous aural terrain warni...

Attributes
ACN	1470856
Time
Date	201708
Local Time Of Day	0601-1200
Place
Locale Reference	MHT.Airport
State Reference	NH
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Medium Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Vectors
Flight Plan	IFR
Component
Aircraft Component	GPWS
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Inflight Event / Encounter CFTT / CFIT

Narrative:

We were cleared for the ILS 17 into mht; when we were descended to; 2500 ft given heading 140 to intercept; and cleared for the approach. We were passing a scattered layer when we got the field in sight. As the aircraft turned from heading 140 and intercepted the localizer; we received 1 'terrain' aural annunciation. I immediately reached to turn off the autopilot; asked the first officer (first officer) to look for terrain; and scanned around myself. We saw no terrain and received no further warnings. I left the autopilot on and had the aircraft continue the approach and land in a normal; stabilized fashion. I believe this was an anomaly.

Original NASA ASRS Text

Title: Air carrier flight crew reported receiving what was suspected to be an erroneous aural terrain warning while intercepting the Runway 17 localizer at MHT.

Narrative: We were cleared for the ILS 17 into MHT; when we were descended to; 2500 ft given heading 140 to intercept; and cleared for the approach. We were passing a scattered layer when we got the field in sight. As the aircraft turned from heading 140 and intercepted the localizer; we received 1 'Terrain' aural annunciation. I immediately reached to turn off the autopilot; asked the FO (First Officer) to look for terrain; and scanned around myself. We saw no terrain and received no further warnings. I left the autopilot on and had the aircraft continue the approach and land in a normal; stabilized fashion. I believe this was an anomaly.

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.

Air carrier flight crew reported receiving what was suspected to be an erroneous aural terrain warning while intercepting the runway 17 localizer at mht.