Tuesday, August 30, 2016

Republic RC-3, N6490K: Accident occurred August 30, 2016 in Post Oak, Henry County, Missouri

The National Transportation Safety Board did not travel to the scene of this accident.

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

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

http://registry.faa.gov/N6490K

NTSB Identification: CEN16LA355
14 CFR Part 91: General Aviation
Accident occurred Tuesday, August 30, 2016 in Post Oak, MO
Probable Cause Approval Date: 03/06/2017
Aircraft: REPUBLIC RC3, registration: N6490K
Injuries: 1 Serious.

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 private pilot was conducting a local flight when the airplane’s engine started to lose power.  The pilot attempted a forced landing to a field; however, the airplane collided with trees. Examination of the airplane’s engine noted that compression was low in all cylinders, and rust was present inside the cylinders.  The airplane was not operated for about 4 years and had flown about 2 hours since being returned to service.  The partial loss of engine power is consistent with a degradation in cylinder compression, and it is likely that rust formed in the engine during the time the airplane was not being used. 

The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
A partial loss of engine power due to low cylinder compression. Contributing to the loss of engine power was rust formation in the cylinders due to inactivity.

On August 30, 2016, about 0855 central daylight time, a Republic RC3 amphibian airplane, N6490K, conducted a forced landing near Post Oak, Missouri. The private rated pilot received serious injuries and the airplane was substantially damaged during the accident. The airplane was registered to and operated by a private individual, under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed at the time.

The pilot reported to the Federal Aviation Administration (FAA) inspector that the flight had just departed from a private airfield. During the flight, he felt the engine had lost power in a cylinder and tried to return to the airfield; however, he could not maintain altitude and elected to conduct a forced landing in a field. During the approach to the field, the airplane lost altitude and impacted trees, coming to rest nose low among several trees.

An on-site examination of the airplane revealed substantial damage to the airplane's fuselage and wings, and fuel was present on site.

An examination of the airplane's engine was conducted by the FAA inspector. The inspector noted that during a cylinder compression check of the engine, the No. 1, cylinder exhaust valve was not seating, and air was leaking past the piston rings on the other cylinders. He noted that the compressions on all the engine cylinders were low. He added that the cylinders appeared to have rust in them. He also reported that the pilot said the airplane sat for about 4 years before the airplane was returned service. The airplane had flown about two hours after being returned to service, before the accident flight.



NTSB Identification: CEN16LA355
14 CFR Part 91: General Aviation
Accident occurred Tuesday, August 30, 2016 in Post Oak, MO
Aircraft: REPUBLIC RC3, registration: N6490K
Injuries: 1 Serious.

This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed. NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

On August 30, 2016, about 0855 central daylight time, a Republic RC3 amphibian airplane, N6490K, conducted a forced landing near Post Oak, Missouri. The private rated pilot received serious injuries and the airplane was substantially damaged during the accident. The airplane was registered to and operated by a private, under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed at the time.

The pilot reported to the Federal Aviation Administration (FAA) inspector that the flight had just departed from a private airfield. During the flight, he felt the engine had lost a cylinder and tried to return to the airfield; however, he could not maintain altitude and elected to conduct a forced landing in a field. During the approached to the field, the airplane lost altitude and impacted trees, coming to rest among several trees.

Substantial damage was noted to the airplane's fuselage and wings. Fuel was present on site. 

The airplane was retained for further examination.


CLINTON, Mo. —The pilot of a small plane walked away from a crash in Henry County Tuesday afternoon, the Missouri State Highway Patrol said.

The Republic RC-3 crashed south of Southeast 1300 Road, 12 miles north of Clinton.

Troopers tweeted photos of a plane nose-down in some trees.

The pilot, Cecil Bumgarner, 87, was treated for a broken shoulder.

The cause of the crash is under investigation.

Source:   http://www.kmbc.com

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