“The thrumming noise when you embark is almost certainly the APU,” says Smith ... Smith explains: “Aircraft have multiple hydraulic systems to provide a back-up should one fail.

Revised flight paths from Van Nuys Airport aimed to reduce noise complaints, but some residents claim the changes shifted the roar to other parts of the Valley.

Its three major objectives are the generation of fuel savings to Airlines, the reduction of noise and polluting ... conditions at the aircraft stand. SAS will secure that at the gate, solutions will ...