NEW ORLEANS  — Louisiana Gov. Kathleen Blanco lashed out at the Army Corps of Engineers on Wednesday for installing defective pumps at three major drainage canals just before the start of last summer’s hurricane season.

“This could put a lot of our people in jeopardy,” Blanco said. “It begs the question: Are we really safe?”

She called for a congressional investigation into how the Corps allowed it to happen.

Citing internal documents, the Associated Press reported Tuesday that the Corps installed the 34 pumps last year in a rush to fix the city’s flood defenses, despite warnings from one of its experts that the machinery was defective and likely to fail in a storm.

At the same time, the Corps, the White House and state officials were telling residents that it was safe to come back to New Orleans, which was devastated in August 2005 when Hurricane Katrina breached the city’s floodwalls.