The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 2026
Filed:
Mar. 28, 2025
Pratt & Whitney Canada Corp., Longueuil, CA;
PRATT & WHITNEY CANADA CORP., Longueuil, CA;
Abstract
A method is provided for operating an aircraft engine in a fire-induced emergency state. The engine is housed in a nacelle defining a nacelle bypass duct having a first outlet fluidly connected to an inlet of the engine and a second outlet fluidly connected to an environment external to the nacelle. An indication of a fire of the aircraft engine is received. In response to receiving the indication, an emergency shutdown sequence of the engine is initiated. In response to the initiating the emergency shutdown sequence, a volume of air entering the inlet of the aircraft engine is increased by restricting air flow through the second outlet of the nacelle bypass duct. The volume of air entering the inlet is used to drive a rotor of the engine. The rotor is used to drive an oil pump to circulate oil through a main oil conduit of the engine.