The accident put the spotlight on the airline's Lockheed L-1011 TriStar aircraft, which suffered from maintenance problems, particularly with the turbine blades of the Rolls-Royce RB211 engine. This made it difficult to fly them at a profit. The airline also had 25 Boeing 727-100QC aircraft capable of being quickly changed from passenger to cargo aircraft. These weighed more than the airline's standard 727-100s, and therefore consumed more fuel, which made them only marginally profitable when fuel prices were low, but jet fuel prices quadrupled in the 1970s. Eastern also spent $200,000 on a down payment for two Concordes, although it had no suitable routes to fly them on.