The NTSB recommends that the FAA: Require GE Aviation to define a reasonable maximum cycle limit below 4,717 cycles since new for Teleflex-manufactured CF34-1/-3 fan blades, considering the two failures and available data, and require that the blades be removed from service before that limit is exceeded. (A-08-04) Require GE Aviation to include dwell time fatigue testing in the CF34-1/-3 fan blade manufacturing process requirements to verify that any modified manufacturing process adequately reduces the possibility of the presence of aligned alpha colonies in the finished part. (A-08-05) Require GE Aviation to make modifications to the CF34-1/-3 engine design and ensure that an engine unbalance event will not cause the engine to catch fire. (A-08-06) Require GE Aviation to revise the CF34-1/-3 engine manual so that it clearly specifies the aft actuator rod hose elbow orientation and the requirement for adequate slack in the hose. (A-08-07). Require a one-time inspection of the aft actuator rod hoses installed on all CF34-1/–3 engines to ensure hose integrity during an unbalance event. (A-08-08) Require that all operators of Bombardier Canadair Regional Jet-100/-200 airplanes incorporate Bombardierâs redesign of the engine throttle gearbox retention as recommended in Safety Recommendation A-08-03. (A-08-09)