Which condition does NOT typically activate the takeoff configuration warning system?

The takeoff configuration warning system is designed to alert pilots if the aircraft is not properly configured for takeoff. It typically monitors several key conditions to ensure safety during this critical phase.

Flaps extended below standard levels is not typically a condition that activates the takeoff configuration warning system because, during takeoff, the aircraft is expected to have flaps set to a specific position as indicated in the aircraft's operating manual. However, if the flaps are in an undesirable position (not just below standard) or the system detects anything unusual, it would generally trigger a warning.

In contrast, the stabilizer position, incorrect flap position, and speed brakes not stowed are all critical elements that could indeed lead to a warning. The stabilizer needs to be correctly positioned for optimal lift and control, incorrect flap settings can significantly affect takeoff performance and safety, and speed brakes deployed during takeoff can seriously endanger the aircraft's ability to become airborne. Each of these conditions ensures that the aircraft is in a fully prepared state for a safe takeoff, thus being monitored by the takeoff configuration warning system.