For the stab trim warning clacker, at what condition and duration does it sound?

• A. HIGH rate for more than 3 seconds
• B. LOW rate for more than 5 seconds
• C. MED rate for 2 seconds
• D. HIGH rate for 1 second

Answer: (A)

The stab trim warning clacker is an alert for abnormal elevator/stabilizer trim activity. It sounds when the stabilizer trim is moving at a high rate and that movement lasts for more than three seconds. This sustained high-rate cue flags a potential trim runaway or abnormal trim behavior, prompting you to check and intervene. Brief or slower trim movements don’t meet the threshold, so they don’t trigger the clacker. Therefore, the condition is high-rate stab trim movement for more than three seconds.