Defective fan blades on General Electric CF34-3B1 engines should be taken out of service before another inflight fire or engine failure occurs – so says the National Transportation Safety Board. In its March 5 recommendation letters, the safety board cites two previous fan blade failure events, both involving Bombardier CRJ-200s. One occurred July 27, 2006, as Air Nostrum Flight IB8174 was climbing out of Barcelona International at 23,000 feet. The second event occurred May 24, 2007, ...

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