FAA Grounds All Learjet Model 45 Business Jets By Don Phillips Washington Post Staff Writer Tuesday, August 12, 2003; 4:50 PM The Federal Aviation Administration ordered the immediate grounding of all 222 Learjet Model 45 business jets after discovering that a part in the tail section can fail abruptly, possibly leading to a loss of control of the airplane. The grounding is a blow to Learjet owner Bombardier of Montreal, whose stock was already undergoing a pounding in recent months. It was also a blow to Bombardier subsidiary Flexjets, one of three major competitors to Warren Buffett's business jet fractional...