Which BIT caution appears if chip detectors fail?

• A. CHIP IBIT FAIL
• B. CHIP DETECT FAIL
• C. CHIP FAIL
• D. CHIP OK

Answer: (A)

BIT cautions show the outcome of built-in tests for subsystems. For the chip detectors in the engine lubrication system, a failure of that built-in test is indicated by CHIP IBIT FAIL. This phrasing specifically points to a problem with the integrated/IBIT health check of the chip detectors, not simply that a detector has failed or that everything is functioning normally. The other phrases don’t match the standard indication of a built-in-test failure for the chip detectors: they either imply a plain detector fault, a generic chip fault, or an OK status, which isn’t what you’d see when the IBIT itself has failed.