When testing the stall warning system before starting the engines, the master test switch must remain in which position until the column shaker and stall annunciator lights/horn actuate twice?

When testing the stall warning system before starting the engines, the master test switch must remain in which position until the column shaker and stall annunciator lights/horn actuate twice?

• A. LH STALL WARN
• B. RH STALL WARN
• C. LH STALL WARN or RH STALL WARN
• D. STALL WARN OFF

Answer: (C)

Testing the stall warning system is about verifying that the warning channels and their indicators work correctly. The master test switch is used to energize one channel at a time—either the left stall warn or the right stall warn channel. You keep the switch in that chosen position until you observe the column shaker (stick shaker) and the stall annunciator lights or horn actuating twice. This two-actuation requirement confirms that the channel being tested is functioning properly, including both the mechanical shaker and the visual/audible warnings in the cockpit. Performing the test in this way ensures the system is reliable and ready before engine start, by validating the specific channel you selected.

Testing the stall warning system is about verifying that the warning channels and their indicators work correctly. The master test switch is used to energize one channel at a time—either the left stall warn or the right stall warn channel. You keep the switch in that chosen position until you observe the column shaker (stick shaker) and the stall annunciator lights or horn actuating twice. This two-actuation requirement confirms that the channel being tested is functioning properly, including both the mechanical shaker and the visual/audible warnings in the cockpit. Performing the test in this way ensures the system is reliable and ready before engine start, by validating the specific channel you selected.