Final answer:
The amber FAULT light on the ENG BLEED PB indicates an abnormal condition in the bleed air system of an aircraft, which can signal issues like overpressure, leaks, or valve malfunctions.
Step-by-step explanation:
The amber FAULT light on the ENG BLEED PB (Engine Bleed Air Push Button) in an aircraft's cockpit indicates an abnormal condition in the engine's bleed air system. The bleed air system is responsible for providing air for various critical functions such as cabin pressurization, air conditioning, deicing, and starting the engines. A FAULT light could signify a range of issues, such as an overpressure condition, a bleed leak, valve malfunction, or temperature irregularities. Pilots must follow appropriate procedures to identify and rectify the cause of the FAULT indication to ensure the continued safety and operability of the aircraft.