Why It’s Technically Unlikely to Mistake Flaps for Landing Gear on a Boeing 787 Dreamliner

The recent crash of Air India flight AI171 has raised questions about cockpit procedures and aircraft control systems, particularly around the possibility of mistaking flap controls for landing gear operations. While some theories suggest that the co-pilot may have accidentally retracted the flaps instead of raising the landing gear, aviation experts argue that such a mix-up is highly improbable—especially on advanced aircraft like the Boeing 787 Dreamliner.

Key Differences in Design and Operation

In modern commercial aircraft, including the Boeing 787, the landing gear and flap systems are distinctly separate—both in terms of physical placement, cockpit interface, and operational feedback.

1. Distinct Control Levers

The landing gear lever and flap lever are designed to prevent confusion:

The landing gear lever is typically T-shaped and located on the center console, often to the pilot's left or center.

The flap lever, on the other hand, is smaller, shaped differently, and placed separately—often farther to the right and designed to move along a notched track with clearly labeled detents.

This separation minimizes the risk of accidental activation of the wrong system, particularly under the strict and repetitive training regimes pilots undergo.

2. Visual and Audio Feedback

The Boeing 787 cockpit is equipped with an Electronic Centralized Aircraft Monitor (ECAM) and other flight deck displays that immediately alert pilots to configuration changes:

Raising the gear prompts visual confirmation on displays and often triggers a gear retraction sound.

Retracting flaps results in a different kind of display and changes in aerodynamic feel, which pilots are trained to recognize.

Pilots also receive aural alerts and crew callouts when configurations deviate from expected sequences, especially during critical phases like takeoff.

3. Training and Redundancy

Commercial airline pilots undergo extensive training in aircraft-specific simulators, where they are drilled repeatedly on takeoff and landing procedures. Standard callouts like “Gear Up” and “Flaps Up” are part of coordinated actions where both pilots verify the commands and actions.

Furthermore, any significant deviation—such as loss of lift from flap retraction during takeoff—would be instantly noticeable, prompting corrective action. The 787's fly-by-wire system and automatic protections are designed to help stabilize the aircraft even during pilot error.

Technical Safeguards on the 787

The Boeing 787 Dreamliner integrates flight envelope protection systems, which are designed to prevent pilots from making control inputs that could endanger the aircraft’s structural integrity or aerodynamic stability. Although flap retraction is still under pilot control, the system can issue warnings if unsafe configuration changes are made at low altitudes or speeds.

Additionally, interlocks and logic gates prevent the gear from being raised while the aircraft is on the ground. Similarly, flaps are not typically retracted immediately after takeoff unless the aircraft has gained sufficient altitude and speed—parameters which the Flight Management System (FMS) constantly monitors.

Conclusion

While the theory that a flap/gear mix-up caused the crash may appear plausible at first glance, it does not align with the robust design, training, and system redundancies of the Boeing 787 Dreamliner. The controls are ergonomically and functionally distinct, supported by visual, tactile, and auditory feedback. Mistaking one for the other is highly unlikely without a combination of gross human error and system failure.

Further investigation and cockpit voice/data recorder analysis would be necessary to determine the exact cause, but from a technical standpoint, the suggestion that the co-pilot simply confused the flap lever for the landing gear seems inconsistent with modern aviation practices and aircraft design.