Embraer Jet Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Aircraft Equipment Problem Less Severe
Flight Crew FLC complied w / Automation / Advisory; Flight Crew Took Evasive Action
Aircraft; Environment - Non Weather Related
On downwind leg abeam the airport; west side at 3;500 feet in IMC; we received an oral warning: 'terrain terrain; pull up.' We climbed; notified ATC; and leveled off at 4;500 feet. Oral warning quickly ceased. We were in radar contact throughout the entire flight. No other warnings occurred. Continued to destination safely. I believe this was a computer glitch.
ERJ Captain experiences an EGPWS terrain warning while at an ATC assigned altitude of 3;500 feet and on a west side downwind at GSP in IMC. A climb to 4;500 feet is initiated and ATC advised; but the cause of the warning could not be determined.