Washington (CNN) -- A Nigerian man whose wife was among 153 people killed Sunday when an MD-83 aircraft crashed in Lagos, Nigeria, has filed suit against the manufacturer of the plane and its engines, and against the estate of the American who was piloting the aircraft. In a 56-page lawsuit, David Chukwunonso Allison alleges that the plane and its engines were defective and "unreasonably dangerous," leading to the death of his wife of two years, Joy Allison. The lawsuit, filed in the U.S. District Court for the Northern District of Illinois, names the Boeing Co. and its subsidiary, McDonnell Douglas Corp., as well as engine manufacturer Pratt & Whitney Canada Corp. and United Technologies Corp. It also names the estate of Peter Waxtan of Fort Lauderdale, Florida, the pilot of the plane.
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NEW: Pratt & Whitney says it's "cooperating fully with investigating authorities"
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David Chukwunonso Allison's wife, Joy, died in the plane crash Sunday in Nigeria
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His lawsuit alleges the plane and its engines were defective
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Before the crash, the pilot had issued a mayday saying both engines had failed
Nine @placeholder were among those killed, the U.S. State Department said.