Patent ID: 11859563
Assignee: PRATT & WHITNEY CANADA CORP.
Field: Transport (Mechanical engineering)
Classification: CPC F  B  Y | IPC B  F

Claim 0:
1. A method of operating an engine of an aircraft, the engine having a main gaspath extending through a compressor section, a combustor, and a turbine section, the engine having a secondary air system outside the main gaspath and including one or more of a sealing system and a lubrication system, the method comprising: when the aircraft is in flight at an altitude above ground, directing pressurized air from a source of pressurized air external to the engine to the secondary air system of the engine, the engine being operated in a standby mode in which the engine is operating, receiving a fuel flow, and providing substantially no motive power to the aircraft, wherein the directing of the pressurized air to the secondary air system includes directing the pressurized air to the secondary air system while bypassing the gaspath;
providing at least one control valve disposed fluidly between the engine and a second engine,
fluidly connecting the at least one control valve to a bleed outlet of the compressor section via a first conduit,
fluidly connecting the at least one control valve to a bleed outlet of a compressor section of the second engine via a second conduit,
each of the first and second conduits include a plurality of branch conduits disposed in between the respective bleed outlets and the at least one control valve,
wherein the plurality of branch conduits are configured to provide the bleed air from the respective first and second conduits to one or more of the sealing system and the lubrications system.