On July 30, 1997, a Boeing B75N1 (registration N75939) was involved in an aviation accident near Lone Rock, WI. No fatalities were reported. Investigators recorded the probable cause as: a locked right brake which resulted in the pilot's inability to maintain direction control of the airplane during the landing roll. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During landing roll, the airplane veered uncontrollably to the right, the left wing contacted the ground, and the aircraft turned 180 degrees before coming to rest on its nose. Post-accident inspection revealed the crankcase breather tube was routed down the right main landing gear strut, allowing oil residue to contaminate the brake system.
Incident Description
The pilot reported that during the landing roll, the airplane veered 'uncontrollably' to the right. The left wing subsequently contacted the ground, and the airplane continued turning until it came to rest on its nose, oriented 180 degrees opposite to the direction of landing.
Post-Accident Inspection
Following the incident, an inspection of the airplane was conducted. Investigators found that the crankcase breather tube was routed down the right main landing gear strut. This routing allowed oil residue to contaminate the brake system.
Findings
The contamination of the brake system by oil residue from the crankcase breather tube was identified as a condition present at the time of the incident. No other anomalies were reported in the inspection.
Frequently asked questions
What happened in the 30 Jul 1997 Boeing B75N1 accident near Lone Rock, WI?
During landing roll, the airplane veered uncontrollably to the right, the left wing contacted the ground, and the aircraft turned 180 degrees before coming to rest on its nose. Post-accident inspection revealed the crankcase breather tube was routed down the right main landing gear strut, allowing oil residue to…
Were there any fatalities in the 30 Jul 1997 Boeing B75N1 accident?
No fatalities were recorded in this accident.
What aircraft was involved and where did it happen?
The accident on 30 Jul 1997 involved a Boeing B75N1, registration N75939, at Lone Rock, WI.
What was the probable cause of the accident?
a locked right brake which resulted in the pilot's inability to maintain direction control of the airplane during the landing roll.
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