On July 21, 1996, a Boeing A75N1 (registration N58712) was involved in an aviation accident near East Troy, WI. Investigators recorded the probable cause as: corrosion and fracture of the rudder control horn. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During the landing roll on runway 8, the airplane drifted right; gentle braking led to a nose-over. Examination found a fractured left rudder horn with overstress separation and corrosion pits that reduced wall thickness.
Incident Summary
A pilot reported a normal approach to land on runway 8. During the landing roll, the airplane began to drift to the right. The pilot applied the brakes gently, and the airplane nosed over.
Examination Findings
Post-incident examination of the airplane revealed that the left rudder horn was fractured. No other evidence of mechanical malfunction was reported. A metallurgical examination of the rudder horn showed no evidence of progressive cracking, such as fatigue. The fracture was typical of an overstress separation. The examination also found thinning of the wall and corrosion pits on the inside surface of the tube. Measurements of some of the corrosion pits indicated that the thickness of the 0.035-inch wall tubing was corroded to a thickness of 0.008 inches in some areas. There was no indication that any of the corrosion pits had penetrated through the tube to the outside surface.
What happened in the 21 Jul 1996 Boeing A75N1 accident near East Troy, WI?
During the landing roll on runway 8, the airplane drifted right; gentle braking led to a nose-over. Examination found a fractured left rudder horn with overstress separation and corrosion pits that reduced wall thickness.
What aircraft was involved and where did it happen?
The accident on 21 Jul 1996 involved a Boeing A75N1, registration N58712, at East Troy, WI.
What was the probable cause of the accident?
corrosion and fracture of the rudder control horn.
A SkyWalk Join't 3 paraglider crashed into the ground near Las Vizcachas, Chile, on September 1, 2024. The pilot and passenger sustained serious spinal…
PARAPENTE (ULTRALIVIANO NO MOTORIZADO)·2024-09-01DGAC Chile
A Cessna 172N struck electrical cables while on final approach to land at Aucó Aerodrome in Chile. The pilot was uninjured, but the aircraft sustained damage…
A Bombardier DHC-8-402 suffered a tail strike during landing at Puerto Williams on September 9, 2024. All 76 occupants were unharmed, but the aircraft…
A MYD JS-MD 3 glider veered off the runway and struck a wall at Vitacura Aerodrome on January 6, 2025. The pilot was uninjured, but the aircraft sustained…
A recreational paraglider flight in Puchuncaví, Chile, ended with the pilot sustaining serious injuries after a rapid descent and impact with a hillside on…
PARAPENTE (ULTRALIVIANO NO MOTORIZADO)·2025-03-29DGAC Chile
A Tecnam P2006T landed on its belly at an aerodrome in Poland after the crew failed to confirm landing gear deployment. The incident resulted in no injuries…