Understanding the Unique Gear Retraction System in Boeing 787 Dreamliners

Boeing 787-9 and 787-10 Dreamliners feature a distinct system for retracting landing gear known as the early doors function. This system initiates the opening of the main landing gear doors soon after take-off, even before pilots move the gear lever.

The early doors function allows the main landing gear doors to begin opening automatically shortly after take-off.

What has been confirmed

In the Boeing 787-9 and 787-10, the early doors function causes the main landing gear doors to open approximately one second after take-off. If the pilots do not move the landing gear lever to UP within about 30 seconds, the doors automatically close, returning to a normal aerodynamic configuration. In contrast, the Boeing 787-8 retains the conventional system where gear doors open only after the lever is manually moved to UP by the flight crew.

Why it matters

For the US commercial aviation industry, this system enhances performance by reducing drag immediately after take-off, crucial for maintaining efficiency. Additionally, in the scenario of an engine failure during take-off, this function aids in quicker landing gear retraction, thus supporting climb performance during such critical situations.

FlyMarshall context

The early doors function represents a technological advancement in aircraft design that reflects Boeing's ongoing commitment to efficiency and safety enhancements. As airlines seek to optimize fuel use and performance, such engineering innovations play a pivotal role. Understanding these systems is essential for both aviation professionals and passengers aware of advancements in aircraft technology.

What happens next

While this system is already implemented in the Boeing 787-9 and 787-10, it will be interesting to monitor how similar innovations may be integrated into future models or other aircraft types to further enhance operational efficiency.