What happened
On 2 September 2000, a Messerschmitt ME109G, registration N700E, was completing a private flight at Lydd Aerodrome, Kent. During the approach for Runway 32, the pilot identified that the right toe-brake was non-functional, as no pressure could be achieved with the right foot. Following a go-around, the pilot evaluated landing on the longer Runway 2/20, noting that a 10-knot crosswind from the right might assist in maintaining directional control using only the left brake.
After a successful three-point touchdown, the aircraft traveled approximately 2,500 feet along the runway. Despite the application of full right rudder, the aircraft drifted left off the runway surface. In an attempt to prevent the aircraft from bogging down in the soft ground, the pilot unlocked the tailwheel. As the aircraft decelerated to roughly 20 mph, the landing gear collapsed.
The investigation
Investigators examined the aircraft's braking system and discovered a broken hydraulic line on the right wheel brake. Traces of hydraulic fluid were found on the wing flap, suggesting the leak occurred while the aircraft was airborne, potentially during takeoff or the subsequent flight.
The pilot noted that the aircraft had encountered a significant bump during takeoff. It was determined that this jolt likely caused the landing gear door, which is rigidly mounted to the wheel axle, to flex. This movement placed undue stress on the aluminium alloy brake pipe near its connector nut, leading to a fracture.