Abnormal start advisory system (ASAS) for aircraft engines

US4908618A · kind A · utility

Assignee

• The Boeing Company · US

Inventors

• Thomas M. Baker · Renton, US
• Michael Dunn · Federal Way, US
• Jeffrey E. Duven · Renton, US
• Jim W. Hackler · Renton, US
• Peter J. Louden · Mercer Island, US
• Clifford M. Schjoneman · Issaquah, US

Key dates

• Filing date: Dec 27, 1988
• Grant date: Mar 13, 1990
• Expiry date: Dec 27, 2008

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D21/02
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Flight deck information warning system for notifying the flight crew of abnormal engine operating conditions in the sub-idle region. The warning system is responsive to signals representative of engine exhaust temperature, engine core rotor speed, total air temperature, engine fuel flow and, airframe calibrated airspeed.