The Silvercrest accessory gearbox
facilitates the transmission of power from the engine core to the engine and aircraft accessories including the fuel pump, lube pump, generators, and hydraulic pump.
The intent of the procedure is to have power after you crash land and secure the engines, but the APP also drives the accessory gearbox
. What if the accessory-gearbox drive shaft (from the main gearbox to the accessory) shears?
• OmniLip[TM] rotary shaft seals for the internal and accessory gearbox
where high speed of the shaft is key with extremes up to 20,000 RPM, in combination with temperature that can vary in a wide range (-50/+175 [degrees]C).
Its principal products include helicopter gears and transmissions, accessory gearbox
assemblies, rotorcraft drive systems and other machined and fabricated parts.
The T700 engine is unique in that it has a built-in integrated particle separator (IPS) blower as part of the engine's accessory gearbox
. It was designed to separate sand and dirt from inlet air and blow the particles out before entering the compressor inlet.
While doing a daily inspection on an MH-53E, Petty Officer Johnson discovered severe scoring on the drive shaft for the accessory gearbox
from an improperly routed hydraulic line.