Which QRC item indicates Stab Trim Runaway?

Which QRC item indicates Stab Trim Runaway?

• A. START MALFUNCTION ON GROUND
• B. STAB TRIM RUNAWAY
• C. FLAP FAIL LANDING
• D. ENGINE FIRE ON GROUND

Answer: (B)

Uncontrolled movement of the stabilizer trim is the situation being identified. Stab trim runaway means the horizontal stabilizer trim is moving on its own, rapidly and uncontrollably, which can change the aircraft’s pitch and require immediate action to stop the trim. The item that directly names this exact condition is the one that reads "Stab Trim Runaway." In a Quick Reference Checklist, the wording is the cue you follow to initiate the appropriate procedure, so matching the condition to its exact phrase is how you quickly recognize the scenario. The other options describe different emergencies—engine start malfunction on the ground, flap system failure during landing, and an engine fire on the ground—none of which indicate a runaway stabilizer trim.

Uncontrolled movement of the stabilizer trim is the situation being identified. Stab trim runaway means the horizontal stabilizer trim is moving on its own, rapidly and uncontrollably, which can change the aircraft’s pitch and require immediate action to stop the trim.

The item that directly names this exact condition is the one that reads "Stab Trim Runaway." In a Quick Reference Checklist, the wording is the cue you follow to initiate the appropriate procedure, so matching the condition to its exact phrase is how you quickly recognize the scenario.

The other options describe different emergencies—engine start malfunction on the ground, flap system failure during landing, and an engine fire on the ground—none of which indicate a runaway stabilizer trim.