Patent ID: 7878302

Claim:
A gas turbine engine comprising a lubrication arrangement for a bearing, the arrangement comprising: a flow pipe having a main lubrication flow, a feed flow pipe having an outlet for presentation of a forced lubricant fluid flow, or scavenging of lubricant fluid; a drain restrictor comprising an anti-siphon tube associated with the flow pipe and the feed flow pipe; a supply pipe is connected to the flow pipe, the supply pipe including a manifold, wherein the supply pipe is connected to a first end of the anti-siphon tube on a first side of the manifold and is connected to a second end of the anti-siphon tube on a second side of the manifold; the anti-siphon tube being positioned to prevent siphoning and/or drawback of fluid from the feed flow pipe, and the feed flow pipe being positioned gravitationally below the outlet to provide a lubricant fluid retainer for the outlet of the feed flow pipe upon removal of forcing pressure for the forced lubricant fluid flow in the event of engine shut down.