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Safety pin omission causes collapse of the nose gear of a Boeing 787 from Lufthansa, This is how the preliminary report reveals. Foto Speedbird HD
The global aviation industry is closely analyzing the preliminary findings on the unusual ground accident of a Boeing 787-9 at Frankfurt airport, an event that reopens the debate on strict adherence to ramp maintenance and safety procedures. This technical report exposes how a seemingly minor omission during a systems test triggered the immediate collapse of the front landing gear, causing injuries to dozens of people and considerable damage to a state-of-the-art aircraft.
Accident summary
The 4 June 2026, a Boeing 787-9 Dreamliner operated by a German airline suffered the unexpected collapse of its nose gear while it was parked at gate A15 of the terminal 1 from the airport of Frankfurt (EDF). The plane was being prepared for a long-haul flight to Los Angeles when the forward section of the fuselage and both engine covers struck the concrete., also affecting a freight elevator (High Loader) positioned on the front cargo door. At the time of collapse, 28 people were on board among crew, technicians and service personnel on ramp, resulting in a total of 21 people with minor injuries and 2 with serious injuries.
- Date and time: 4 June 2026, approximately at 10:45 UTC.
- Location: Door A15, terminal 1, Frankfurt airport (EDF), Germany.
- Operator: German commercial operator.
- Aircraft: Boeing 787-9.
- Serial number: MSN 66827.
- Registration: Not specified in the preliminary report of the investigative body.
- Damage to the aircraft: Substantial, located in the nose of the fuselage, the nose gear box and both engine covers.
- Victims: 23 injured in total (2 serious and 21 light).
Operation summary
The aircraft had landed in Frankfurt at 07:02 UTC after completing an overnight transatlantic flight from Austin, USA. With a scheduled departure to Los Angeles at 11:50 UTC, ramp and cabin preparation activities were carried out in parallel. While the cleaning staff finished their work in the rear and the command crew entered the plane, Two maintenance technicians set out to resolve a pending report on the main landing gear door control system.. The technicians were located in the pilots' seats to begin the diagnostic tests using the corresponding manuals..
Preliminary research findings
The German Federal Aviation Accident Investigation Office (BFU) determined that maintenance technicians were executing a procedure guided by the fault isolation manual (FIM). This process specifically required placing the landing gear lever in the up position. («UP»). According to technical records, step number five of the manual (Item 5) Mandatory instructions for the installation of locking security pins (downlock pins) on the landing gears before pressurizing the hydraulic system and operating the lever.
The post-accident inspection revealed that, although the four main gear safety pins were correctly placed, the nose gear safety pin had not been installed. Investigators located the nose gear locking pin intact, with its red warning flag, stored inside its storage compartment in the avionics bay, under the cockpit. When moving the lever to "UP" with the central hydraulic system pressurized at 5,000 psi and without the physical barrier of the pin, the nose gear mechanism immediately retracted under the aircraft's own weight.
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