# NTSB ATL05CA083: Rand Robinson Engineering KR-2, N1701L, Vienna, GA, May 17, 2005 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Data collection · Final report - Date: May 17, 2005, 10:13 local (14:13 UTC) - Place: Vienna, GA - Coordinates: 32.083332, -83.683334 - Nearby events: https://openairdocs.org/map.md?lat=32.0833&lon=-83.6833&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor - Status: Completed, report June 28, 2006 - Report: Approved by Office Director - Parties: Federal Aviation Administration FSDO 11 - NTSB case key (mKey): 61698 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL05CA083 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/61698/pdf - Page: https://openairdocs.org/ntsb/ATL05CA083 ## Probable cause A loss of engine power due to the owner/pilot mechanic's improper balancing of the modification to engine crankshaft which resulted in an overload failure. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, cruise - maintenance,modification - inadequate, owner/pilot mechanic (cause) - maintenance,balancing - inadequate, owner/pilot mechanic (cause) - engine assembly,crankshaft - overload (cause) - engine assembly,crankshaft - fractured (cause) - Loss of engine power, cruise - Forced landing, emergency landing - On ground/water collision with object, emergency landing - terrain condition - ground ## Analysis While flying at 3,500 feet the pilot noticed that the engine was losing power and vibrating. The pilot stated that he shut the engine off and decided to make an emergency landing. The pilot first attempted to make it to a crop duster airstrip, but could not, and decided to attempt a landing on the highway. The airplane landed on a westerly heading, veered off the highway, hit an embankment and rotated 180-degrees to the left and came to rest on an easterly heading. Examination of the engine revealed the crankshaft was broken just behind the front main bearing before the crankshaft exits the engine and attaches to the propeller. The post-accident examination revealed that the crankshaft had an extension between it and the propeller in order for it to clear the cowling. Maintenance records showed that on May 3, 2005, the propeller extension was found to be out of true and the shaft, propeller and spinner combination were balanced. At the accident site, it was observed that washers were affixed to the back of the propeller spinner and the propeller spinner contained voids in the fiberglass. It was also noted that the crankshaft broke approximately 8.2 hours after the shaft, propeller and spinner combination were balanced. ## Factual narrative On May 17, 2005 at 1013 eastern daylight time, a Rand Robinson Engineering KR-2, N1701L, registered to and operated by a private pilot, collided with an embankment while attempting an emergency landing in Vienna, Georgia. The personal flight operated under the provisions of Title 14 CFR Part 91. Visual meteorological conditions prevailed at the time of the accident and no flight plan was filed. The pilot suffered minor injuries. The airplane was substantially damaged. The flight originated from Cobb County-McCollum Field in Marietta, Georgia on May 17, 2005 at 0930. The flight was enroute to Valdosta, Georgia, at 3,500 feet when the pilot noticed that the engine was losing power and was simultaneously vibrating. The pilot stated that he shut the engine off and decided to make an emergency landing. The pilot first attempted to make it to a crop duster airstrip, but could not and decided to attempt a landing on the highway. The airplane landed on a westerly heading, veered off the highway, hit an embankment and rotated 180-degrees to the left and came to rest on an easterly heading. Examination of the accident site revealed the wreckage was located six miles east of Vienna, Georgia on Georgia Highway 15. Examination of the airplane revealed the right landing gear sheared forward, the left landing gear sheared completely off, and the right wing rear spar fractured. The left wing fuel tank had approximately four gallons of fuel, the right wing fuel tank did not have any visible fuel and the main header fuel tank had approximately 13 gallons of fuel. Examination of the engine revealed the crankshaft was broken just behind the front main bearing before the crankshaft exits the engine and attaches to the propeller. Further examination revealed that the crankshaft had an extension between it and the propeller in order for it to clear the cowling. A review of maintenance records show that a condition inspection was performed by the pilot, who holds a repairman certificate, on March 13, 2005. Maintenance records also show that on May 3, 2005, the propeller extension was found to be out of true and the shaft, propeller and spinner combination was balanced. At the accident site, it was observed that washers were affixed to the back of the propeller spinner and the propeller spinner contained voids in the fiberglass. It was also noted that the crankshaft broke approximately 8.2 hours after the shaft, propeller and spinner combination were balanced. ## Aircraft - Registration: [N1701L](https://openairdocs.org/aircraft/N1701L), registered now, S/N 4176 (OpenAirDocs) - Reported make and model: Rand Robinson Engineering KR-2 - Registry model: [Lester Robert E KR-2](https://openairdocs.org/model/lester-robert-e-kr-2) (registry code 0561131) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 4176 - Airframe hours: 226 - Engines: Chevrolet Covair reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Robert E. Lester - Registered owner: Robert E. Lester - Last inspection: Condition, March 1, 2005, 24 hours before - Departed: RYY, MARIETTA, GA - Destination: VLD, Valdosta, GA ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 52; injuries: minor; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review June 1, 2003; flight hours: 1,261 total, 250 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: variable at 5 knots - Visibility: 10 statute miles - Temperature: 75 °F, dew point 52 °F - Altimeter: 30.01 inHg - Observed at: KABY, 34 nm away ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20050517012609A](https://openairdocs.org/incident/20050517012609A), May 17, 2005: Amtr KR2, Vienna, GA, Substantial damage. (-23) On may 17, 2005, at approximately 1013 EDT, a KR2, an amateur built experimental aircraft, N1701L crash landed approximately six miles east of Vienna,… ## Other investigations on N1701L (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB ERA12CA198](https://openairdocs.org/ntsb/ERA12CA198), Mar 1, 2012: Lester Robert E KR-2 (N1701L), Boca Raton, FL, substantial damage. Probable cause: The failure of the airplane’s engine air inlet system resulting in a total loss of engine power. From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.