The overhead bins on the 737-900 (739) are equipped with a mechanism that reduces the maximum closing force of a fully loaded bin. What is this mechanism called?

• A. Bin assist mechanism
• B. Automatic closure system
• C. Close assist lever
• D. Latch reduction system

Answer: (A)

The mechanism that reduces the maximum closing force of a fully loaded overhead bin on the 737-900 is referred to as the "bin assist mechanism." This design feature is crucial because it enhances user experience by making it easier for passengers to close the overhead bins, especially when they are fully loaded with luggage. The bin assist mechanism works by providing a mechanical advantage that minimizes the effort required to close a heavy bin, thus preventing strain and potential injury for passengers.

The other terms mentioned do not accurately describe this specific functionality. An "automatic closure system" typically implies a system that autonomously closes the bin without passenger intervention, which is not the case here. A "close assist lever" would suggest a manual lever that the passenger must engage, rather than a built-in mechanism that eases the load on closing. Lastly, a "latch reduction system" could imply a change in how the bin latches, but it does not capture the essence of the assistive function that facilitates the closing action itself. Therefore, "bin assist mechanism" is the precise terminology that reflects the design and purpose of the system in question.