A lubrication system for a gas turbine engine, the system comprising: a gearbox, the gearbox comprising a sump; an oil tank; a primary gearbox lubrication system configured to pump oil from the oil tank to lubricate the gearbox with a gearbox primary feed; a secondary gearbox lubrication system, configured to lubricate the gearbox with oil from the sump when the oil level in the sump reaches a predetermined level; wherein the system is configured to increase the oil level in the sump to at least the predetermined level in response to a failure of the primary gearbox lubrication system.

A lubrication system for a gas turbine engine, the system comprising: a gearbox, the gearbox comprising a sump; an oil tank; a primary gearbox lubrication system configured to pump oil from the oil tank to lubricate the gearbox with a gearbox primary feed; a secondary gearbox lubrication system, configured to lubricate the gearbox with oil from the sump when the oil level in the sump reaches a predetermined level; wherein the system is configured to increase the oil level in the sump to at least the predetermined level in response to a failure of the primary gearbox lubrication system.

A lubricant scoop is disclosed. The lubricant scoop includes an annular body configured for engagement with a shaft rotating about a central axis. The annular body includes a first annular portion and a second annular portion disposed adjacent the first annular portion. The first annular portion includes a radially oriented entrance surface and a first axially oriented transition surface. The second annular portion includes a second axially oriented transition surface, a primary redirection member spaced radially outward from the second axially oriented transition surface, a radially oriented exit surface and an exit conduit having an opening positioned on the radially oriented exit surface.

A lubricant scoop is disclosed. The lubricant scoop includes an annular body configured for engagement with a shaft rotating about a central axis. The annular body includes a first annular portion and a second annular portion disposed adjacent the first annular portion. The first annular portion includes a radially oriented entrance surface and a first axially oriented transition surface. The second annular portion includes a second axially oriented transition surface, a primary redirection member spaced radially outward from the second axially oriented transition surface, a radially oriented exit surface and an exit conduit having an opening positioned on the radially oriented exit surface.

An auxiliary oil supply apparatus for a rotating device (50, 51), the rotating device comprising a primary oil supply (52), a rotating component (50) and a static component (51) situated radially outwardly of a centre of rotation of the rotating component (50) and arranged to collect oil (58) held radially outwardly from the rotating component (50) as the rotating component rotates. The auxiliary oil apparatus comprises a scoop (56) associated with the rotating component (50) and is responsive to a change in a known parameter to move between a first position in the static component (51) to a second position between the static component (51) and the centre of rotation.

An auxiliary oil supply apparatus for a rotating device (50, 51), the rotating device comprising a primary oil supply (52), a rotating component (50) and a static component (51) situated radially outwardly of a centre of rotation of the rotating component (50) and arranged to collect oil (58) held radially outwardly from the rotating component (50) as the rotating component rotates. The auxiliary oil apparatus comprises a scoop (56) associated with the rotating component (50) and is responsive to a change in a known parameter to move between a first position in the static component (51) to a second position between the static component (51) and the centre of rotation.

A centrifugal pump includes at least one impeller and a distribution arrangement. The at least one impeller is driven by a shaft. The shaft is rotatably supported by bearings. The distribution arrangement is immersed in a lubricating means. The distribution arrangement is operatively connected to the shaft. The distribution arrangement is configured as a structure formed of at least two elements.

Described is an oil distributor comprising: an oil distribution conduit having an inlet end and an outlet; an oil delivery arrangement at the outlet of the oil distribution conduit, the oil delivery arrangement including a circumferential channel having a base, an upstream wall and a downstream delivery wall, wherein the delivery wall includes a plurality of circumferentially distributed delivery apertures extending therethrough.

Described is an oil distributor comprising: an oil distribution conduit having an inlet end and an outlet; an oil delivery arrangement at the outlet of the oil distribution conduit, the oil delivery arrangement including a circumferential channel having a base, an upstream wall and a downstream delivery wall, wherein the delivery wall includes a plurality of circumferentially distributed delivery apertures extending therethrough.

A lubrication injector comprising a housing and a translating metering body axially moveable with respect to the housing and provided with a lubricant supply channel. The injector includes at least one translating intermediate piston radially interposed between the metering body and the housing and axially moveable with respect to the housing, the intermediate piston carrying the metering body. The intermediate piston is mounted slidable axially on the metering body. The intermediate piston and the metering body delimit at least partly a metering chamber for a lubricant in communication with the supply channel of the metering body.