Commercial Fixed Wing
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Inflight Event / Encounter CFTT / CFIT
Flight Crew Took Evasive Action; Flight Crew Returned To Clearance
Environment - Non Weather Related; Human Factors
While on vectors for the ILS to Runway 33 at BTV; ATC cleared aircraft to descend and maintain 5;500 feet. Captain had TERRAIN display set on his MFD. While level at 5;500 feet the EGPWS aural annunciation TERRAIN PULL UP sounded. Flight crew disconnected the autopilot and initiated a climb. ATC was notified and once the warning was clear the flight returned to the original assigned altitude of 5;500 feet. The flight continued without further incident.The rising terrain while in level flight initiated the EGPWS annunciation. Flight crew immediately disconnected the autopilot and initiated a climb. Continued adherence to policy and procedures and respect for the EGPWS.
Air carrier Captain reported a CFTT event during approach to BTV airport.