Abstract: A pressure fed oil drain for gas turbine engine (10) includes an oil sump (48) and a passage (60, 63) in selective flow communication with the oil sump (48), the passage in flow communication with a drain (62), the passage being pressurized and creating a differential between the passage and ambient atmosphere (65), the drain is disposed at an elevation beneath a passage feature (64) when the turbine engine is disposed at an extreme attitude angle, the passage (63) extending upwardly when in the extreme attitude angle.

Abstract: A pressure fed oil drain for gas turbine engine (10) includes an oil sump (48) and a passage (60, 63) in selective flow communication with the oil sump (48), the passage in flow communication with a drain (62), the passage being pressurized and creating a differential between the passage and ambient atmosphere (65), the drain is disposed at an elevation beneath a passage feature (64) when the turbine engine is disposed at an extreme attitude angle, the passage (63) extending upwardly when in the extreme attitude angle.

Abstract: A bearing support apparatus for a gas turbine engine, including: a first annular member; a second annular member disposed within the first annular member; first and second axially spaced-apart rolling-element bearings disposed between the first and second annular members so as to enable relative rotation of the first and second members; a first spring element mounting the first bearing to the first member; and a second spring element mounting the second bearing to the first member through the first spring element, such that the first and second bearings are physically supported in series relative to the first member.

Abstract: A bearing support cage includes: an annular forward ring; an annular aft ring; an annular mounting flange disposed between the forward and aft rings; an annular array of axially-extending first spring fingers interconnecting the forward ring and the aft ring; and an annular array of axially-extending second spring fingers interconnecting the mounting flange and the aft ring, wherein the first spring fingers are interdigitated with the second spring fingers. The forward and aft rings, the mounting flange, and the spring fingers are all part of a single monolithic component.

Abstract: A bearing support apparatus for a gas turbine engine, including: a first annular member; a second annular member disposed within the first annular member; first and second axially spaced-apart rolling-element bearings disposed between the first and second annular members so as to enable relative rotation of the first and second members; a first spring element mounting the first bearing to the first member; and a second spring element mounting the second bearing to the first member through the first spring element, such that the first and second bearings are physically supported in series relative to the first member.

Abstract: A bearing support cage includes: an annular forward ring; an annular aft ring; an annular mounting flange disposed between the forward and aft rings; an annular array of axially-extending first spring fingers interconnecting the forward ring and the aft ring; and an annular array of axially-extending second spring fingers interconnecting the mounting flange and the aft ring, wherein the first spring fingers are interdigitated with the second spring fingers. The forward and aft rings, the mounting flange, and the spring fingers are all part of a single monolithic component.