Saturday, July 8, 2017

Piper PA-25-235, N4812Y: Accident occurred June 28, 2013 in Salisbury, Chariton County, Missouri

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Kansas City, Missouri

Aviation Accident Final Report - National Transportation Safety Board: https://app.ntsb.gov/pdf

Investigation Docket - National Transportation Safety Board: https://dms.ntsb.gov/pubdms

Aviation Accident Data Summary - National Transportation Safety Board: https://app.ntsb.gov/pdf

http://registry.faa.gov/N4812Y

NTSB Identification: CEN13LA379
14 CFR Part 137: Agricultural
Accident occurred Friday, June 28, 2013 in Salisbury, MO
Probable Cause Approval Date: 02/10/2014
Aircraft: PIPER PA-25-235, registration: N4812Y
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The pilot landed the tailwheel-equipped airplane with a left crosswind on a dirt road. As the airplane slowed down, he applied the right rudder and brake. The pilot said the right brake was soft, and he tried to pump it several times before he decided to go around. After applying power, the pilot was unable to maintain directional control, and the airplane veered off of the road and into a ditch. A postaccident examination of the airplane revealed that, when the right rudder pedal was in the neutral position and the brake was applied, it held pressure. However, when full right rudder and brake were applied, the brake contacted the hopper, which limited the brake's full travel. It could not be determined if the amount of pressure applied to the brake in this condition was enough to provide adequate braking power. However, even with the limitations of the brake with the rudder pedal fully extended, the pilot had made several uneventful landings before the accident and reported no problems with the brakes. He said that the accident could have been prevented if he had decided to go around sooner.

The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
The airplane's reduced braking efficiency and the pilot's subsequent delayed decision to go around, which resulted in a loss of directional control.

On June 28, 2013, at 1400 central daylight time, N4812Y, a Piper PA25-235, sustained substantial damage when it lost control while attempting to land on a dirt road near Salisbury, Missouri. The commercial pilot was not injured. The airplane was registered to and operated by the pilot. Visual meteorological conditions prevailed and no flight plan was filed for the local aerial application flight conducted under 14 Code of Federal Regulations Part 137. 

The pilot said he landed the tail wheel-equipped airplane on a dirt road with a left crosswind. As the airplane slowed down, he applied right rudder and brake. The pilot said the right brake was soft and he tried to pump it several times before he elected to go around. He also said the rudder pedal was hitting up against the hopper. The pilot was unable to maintain directional control and the airplane veered off of the road and into a ditch, which resulted in substantial damage to the airframe.

Examination of the airplane revealed that when the right rudder pedal was in the neutral position and the brake was applied, it held pressure. However, when full right rudder pedal was applied and the brake was pressed, it came in contact with the hopper and limited full travel of the brake. It was not determined if this partial extension of the brake would have had sufficient braking action to slow the airplane. It was also unclear as to why the pedal was hitting the hopper. However, even with the limitations of the brake with the rudder pedal fully extended, the pilot said that he had made several uneventful landings prior to the accident and reported no problems with the brakes. He said the accident could have been prevented if he decided to go around sooner. 

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