Which item is NOT inhibited by the T.O. INHIBIT system?

The T.O. INHIBIT system is designed to prevent certain warnings and alerts from being displayed during critical phases of flight, specifically during takeoff. This system helps reduce pilot workload and distraction by suppressing non-essential alerts that could detract from the focus needed during this phase.

The warning concerning engine oil pressure—specifically, the ENG 1(2) OIL LO PR—remains active even when the T.O. INHIBIT system is engaged. This is crucial because oil pressure is vital for engine performance and safety; an indication of low oil pressure can signify a potentially serious engine issue that must be addressed immediately.

On the other hand, warnings related to SMOKE FWD (AFT) CARGO SMOKE, ELEC DC BUS 1 FAULT, and BRAKES A/SKID NWS FAULT can be inhibited during takeoff since they may not indicate immediate threats during these early phases of flight. The safety systems are designed to ensure that critical alerts, particularly those related to engine failure or malfunction, remain visible to the flight crew to safeguard against hazards.