The FAA has issued a notice of proposed rulemaking to adopt a new airworthiness directive for Airbus Helicopters AS355Es, AS355Fs, AS355F1s and AS355F2s with a Fueltron flowmeter installed. This AD would require removing each flowmeter, replacing the fuel system hoses and disabling the electrical connections for the flowmeter installation. It is prompted by a report of particle contamination creating an obstruction in a flowmeter, resulting in an uncontrolled flameout of the engine.
Boeing has advised GEnx engine operators that it is revising the 787’s and the 747-8’s flight manuals to prohibit flight within 50 nm of thunderstorms that may contain ice crystals. Following Boeing’s recommendation, Japan Airlines immediately announced it would switch aircraft on two routes. From April to November, GEnx-powered aircraft suffered six engine-icing events, according to a GE statement. All aircraft landed at their planned destinations, said the engine maker, and none of the incidents involved in-flight shutdowns–only temporary thrust losses.
UK-based low-cost carrier EasyJet, Airbus and Nicarnica Aviation plan a final test in August of the Nicarnica-developed airborne-volcanic-object imaging detector in a bid to prevent major air traffic disruption like the one the eruption of Iceland’s Eyjafjallajökull caused in 2010.
Many cockpit crewmembers believe the ingestion of ice crystals by a jet engine is essentially harmless if the engine’s igniters are turned on. However, aeronautical engineers generally do not agree, citing incidents when mixing ice with standard intake air resulted in a noticeable reduction in engine power output and, at its worst, a complete engine flameout. Ice formation inside an engine compartment can also lead to indicator anomalies that may not shut down the engine, but may lead to air data system failures.
Why some engines fail in flight is the subject of a new NASA research program. “There is a question regarding the effect that moisture has on newer-technology engines.
The FAA’s Draft Advisory Circular 20-147A released last month provides new guidance to aircraft manufacturers on compliance with regulations covering engine induction system icing and engine installation ice requirements. Comments on the draft AC are due by November 1.
The air transport industry was caught off guard in April when huge plumes of ash from Iceland’s Eyjafjallajökull volcano effectively shut down flying in Europe for a week, stranding thousands of passengers and draining at least $1 billion from air carriers.
The FAA and Pratt & Whitney Canada believe they have found the cause of at least three high-
altitude, dual-engine flameouts on Pratt & Whitney Canada JT15D-5-powered airplanes operating in certain meteorological conditions. In a proposed Airworthiness
The FAA and Pratt & Whitney Canada believe they have found the cause of three high-altitude double engine flameouts on Pratt & Whitney Canada JT15D-5-powered Beechjets between mid-2004 and mid-2006.
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