What is a CI Hook when stating "Gear, flaps up, lights out (airspeed)" with either gear still down or flaps in the TO or LDG position?

A CI Hook, or Critical Item Hook, refers to key items or conditions that need to be checked or confirmed during various phases of flight. When stating “Gear, flaps up, lights out (airspeed)” it emphasizes that for the operation of the aircraft to be considered safe and standard, both the landing gear must be retracted, the flaps must be in the up position, and all relevant lights indicating these systems must be correctly displayed.

If either the gear is still down or the flaps are still in the takeoff or landing position, then these critical items have not been properly configured, meaning that the assertion “Gear, flaps up, lights out” does not hold true. Therefore, it confirms that the statement stands as incorrect in these scenarios, thus reinforcing that the CI Hook is a checklist to ensure safety parameters are met.

Therefore, affirming “True” acknowledges that the critical items of operating gear and flaps must indeed be in the correct condition to consider the statement valid, making this understanding crucial for effective aircraft operation and safety.