31.   Recent recalls have involved manufacturing, not design flaws, he said.

32.   Previous, smaller studies led to contradictory results, and some had design flaws that made them less than definitive.

33.   Slowly but surely, the recall is going forward for houseboats with a potentially deadly design flaw that killed nine people at Lake Powell over a decade.

34.   So suspicions focused on either a submerged object or a design flaw.

35.   Such basic design flaws are easy enough to test for in relatively simple hardware, such as an airplane engine.

36.   The blackout had not been caused by a design flaw, nor indeed by any human error at all.

37.   The board also said the FAA should strengthen its tests for any possible design flaws in the planes.

38.   The design flaw is correctable, Rutan said, and another balloon will be made.

39.   The environmentalists had contended in that lawsuit that the incinerator had design flaws that would cause a fatal leak.

40.   The investigators last month faulted design flaws and engineering decisions by students without engineering expertise.