Pratt & Whitney A320neo engine suffers new test snag

Paris

PRATT & Whitney, a unit of United Technologies, has suffered a fresh problem during testing of new aircraft engines for the Airbus A320neo, but flight trials of the latest version of Europe's best-selling airliner are continuing, people familiar with the matter said.

The problem occurred when an oil pump failed after an engine had been deliberately shut down in flight and left to turn with the natural airflow, a process known as "windmilling" which is designed to ensure an aircraft can fly on only one engine.