The nose gear didn't fail. It folded — exactly as physics demanded once the mechanical lock holding it in place was absent.
When a 130-tonne Boeing 787-9 settles onto a nose strut without its downlock pin engaged, there's no dramatic warning. The gear simply isn't mechanically committed to the down position. Load transfers, the unlock mechanism finds no resistance, and the strut collapses. The aircraft's nose meets the ramp. That's what happened at Frankfurt Airport when a Lufthansa 787-9 suffered a nose gear collapse — and the injuries that followed.
The pin itself is almost insultingly obvious by design. Bright red. Attached to a bright red streamer labeled REMOVE BEFORE FLIGHT. The entire point is that its presence — and its absence — should be impossible to overlook during a walkaround. It is, by engineering intent, the most visible object on the landing gear.
And yet the pin's absence wasn't the system failure. What investigators will be dissecting is how every subsequent verification layer also missed it.
The 787 has three distinct opportunities to surface an improperly configured gear state. Cockpit gear position indicators show whether each leg is down-and-locked. Weight-on-wheels sensors track load distribution across the gear. And the pre-departure walkaround — a procedural checkpoint specifically designed to catch exactly this category of ground equipment left installed or removed.
Three layers. Each independent. Each theoretically sufficient on its own.
The fact that none of them stopped this aircraft from moving into a load-bearing configuration is the real story — not the missing pin, but the missing catches. Frankfurt is one of Lufthansa's primary maintenance hubs, which means the maintenance procedure sequencing, task sign-off records, and shift handover documentation will all come under scrutiny.
Investigators won't be asking who forgot the pin. They'll be asking which step in the sequence made it possible for everyone to believe someone else had already checked.