Word: pylon
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...issue throughout has been why the left engine on the three-engine jetliner literally took off on its own as the 120-ton airplane was rising from the runway at O'Hare. The four-ton engine, exerting a thrust of 40,000 Ibs., had ripped away with the pylon that attached it to the wing. Climbing, the engine apparently tore into the wing, severing at least two of the three hydraulic pressure lines embedded near the forward edge. The loss of the engine, its hydraulic pumps and the hydraulic lines that power vital controls rendered the craft uncontrollable...
...Brizendine at an unusual meeting in his Los Angeles office at 3:48 a.m. Both he and the bearer of the news, Regional FAA Director Leon C. Daugherty, had been called from their homes to keep their rendezvous. The key passage of the order declared that the engine-and-pylon assembly "may not be of proper design, material, specification, construction and performance for safe operation...
...crash has raised troubling questions about the DC-10 design. Is the pylon basically strong enough to hold the engine on under the stresses of takeoff? If not, how should it be modified? And how much might McDonnell Douglas have to pay for it? (A new pylon costs approximately...
...probe went on, the NTSB asked the National Aeronautics and Space Administration to study the long-term effects of vibration and acoustics on engine pod and pylon attachments in all superjets, including those flown by the Air Force. If the NTSB eventually finds the DC-10 pylons are too weak, it could recommend that the plane be grounded again until they are strengthened or replaced, and the FAA most likely would issue such an order...
...procedures of the FAA, which writes the rules for inspecting jetliners and then supervises the work. There was a growing suspicion that the FAA may have relaxed too much, lulled by the fine safety record of jetliners. Shortly after the broken bolt was discovered, the FAA stipulated that pylon inspections had to be repeated every ten days or 100 flying hours, whichever came first. Formerly, it had been done only once a month or every 400 hours...