On April 28, 2002, a Cessna A185E (registration N4730Q) was involved in an aviation accident near Greeley, CO. Investigators recorded the probable cause as: The failure of the left brake due to a ruptured brake line, which caused the aircraft to veer right and ground-loop during the landing roll. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During a training flight, the pilot applied brakes at low speed but experienced a failure of the left brake due to a ruptured line, leading to a ground loop and structural damage.
What happened
The pilot, who was receiving instruction during the flight, reported that late in the landing roll, while the aircraft was traveling at approximately 25 to 30 mph, the brakes were applied. At this moment, the left brake failed because of a ruptured brake line. Consequently, the airplane veered to the right and ground-looped. This loss of directional control resulted in the left wing tip and the left elevator contacting the runway surface.
The investigation
A subsequent examination of the airplane's left main landing gear revealed that the left brake line was cracked, flattened, and leaking brake fluid.
Probable cause
The failure of the left brake due to a ruptured brake line, which caused the aircraft to veer right and ground-loop during the landing roll.