What caution appears if a chip detector fails the PBIT?

What caution appears if a chip detector fails the PBIT?

• A. Chip IBIT Fail
• B. Chip Detector Fail
• C. Oil Pressure Low
• D. System Fault

Answer: (A)

Power-on built-in tests check each subsystem’s sensor and detector circuits as the aircraft powers up. If the chip detector itself doesn’t pass that self-test, the cockpit warning shown is the chip IBIT fail. IBIT stands for the built-in test of that detector, so this message specifically flags a failure in the chip detector’s electronics or wiring, not a general fault in the oil system or a broad system fault. It signals maintenance action is needed to verify or replace the detector and its connections. The other options don’t fit because they describe different conditions: a generic chip detector fault isn’t the standardized PBIT result, oil pressure low is an oil-system condition, and a system fault is too broad for a localized detector self-test failure.

Power-on built-in tests check each subsystem’s sensor and detector circuits as the aircraft powers up. If the chip detector itself doesn’t pass that self-test, the cockpit warning shown is the chip IBIT fail. IBIT stands for the built-in test of that detector, so this message specifically flags a failure in the chip detector’s electronics or wiring, not a general fault in the oil system or a broad system fault. It signals maintenance action is needed to verify or replace the detector and its connections. The other options don’t fit because they describe different conditions: a generic chip detector fault isn’t the standardized PBIT result, oil pressure low is an oil-system condition, and a system fault is too broad for a localized detector self-test failure.