Lawrenceburg, TN, USA
N925PS
SIKES Zenith CH750 STOL
The sport pilot, who was the owner of the light sport airplane that he had partially assembled, was conducting the airplane's first test flight and had a passenger on board. He stated that, after takeoff, he applied right rudder to maintain runway heading, but the airplane continued to the left. As he applied more right rudder, the severity of the turn increased. The airplane departed the left side of the runway and the airport property and struck trees and terrain before it came to rest. Postaccident examination of the wreckage revealed that the rudder was rigged backward, which would have resulted in a left turn upon right pedal application and vice-versa. Examination of maintenance receipts and interviews with the pilot revealed that the pilot purchased the airplane partially assembled. The pilot and mechanics who he hired completed the assembly; however, after the work by other mechanics, the pilot would at times change or redo their work. Although it could not be determined when the rudder was improperly rigged, a preflight inspection would have revealed the discrepancy; therefore, it is unlikely that the pilot conducted a proper preflight inspection before departing on the flight. Additionally, no documentation was found that suggested the pilot had performed planning for the test flight in accordance with Federal Aviation Administration-issued guidance.
On May 22, 2016, about 1330 central daylight time, a Sikes Zenith CH-750 STOL, N925PS, was destroyed during collision with trees and terrain after takeoff from Lawrence County Airport (2M2), Lawrenceburg, Tennessee. The sport pilot and passenger were seriously injured. Visual meteorological conditions prevailed, and no flight plan was filed for the personal flight, which was conducted under the provisions of Title 14 Code of Federal Regulations Part 91.In an interview with a Federal Aviation Administration (FAA) aviation safety inspector, the pilot reported that it was the airplane's first test flight. He stated that after liftoff, he applied right rudder to maintain runway heading, but the airplane continued to the left. As he applied more right rudder, the severity of the turn increased. The airplane departed the left side of the runway and airport property, and struck trees and terrain before it came to rest. According to FAA records, the pilot held a sport pilot certificate with a rating for airplane single engine land. He did not possess an FAA medical certificate, nor was he required to. The pilot reported 40 total hours of flight experience, which he accrued while training for his pilot certificate. A review of his pilot logbook by the FAA inspector revealed that the pilot had not flown in the nearly 12 months prior to the accident flight. The pilot held no other FAA certificates. Specifically, he did not hold a repairman certificate for the accident airplane. The two-seat, single-engine, high-wing airplane was manufactured in 2016 and was equipped with a Continental O-200 series engine. Examination of maintenance logbooks for the airplane revealed only two entries; the condition inspection signed by the pilot and an airworthiness inspection signed by an FAA designated airworthiness representative. The airplane's most recent condition inspection was completed March 16, 2016. The hobbs meter displayed 4.1 total aircraft hours at the accident site. There were no other articles or documents offered or found with regard to the construction of the airplane. There was no construction plan/log, no manufacturer's flight testing instructions or flight testing data, and no flight test plan. There was no additional pilot program for the testing of the airplane. There was no weight and balance data and neither was there taxi-testing data. No operator's checklist was found in the wreckage. Examination of the wreckage by the FAA inspector revealed that the rudder control cables had been rigged backward. Aircraft History FAA inspectors conducted lengthy, detailed interviews with the pilot/owner, his colleagues, and mechanics who had performed work on the airplane during its construction, who learned that the airplane was purchased partially assembled from its original owner. Approximately 13 months prior to the accident flight, a maintenance facility had performed a considerable amount of construction and modification on the airplane, including "installation" of the rudder. After that, the pilot/owner decided that the work performed did not meet his liking or the kit specifications, and undid or modified the work performed by the maintenance facility. It could not be determined who performed the most recent work on the rudder and rudder control system prior to the accident flight. FAA Advisory Circular 90-89A, AMATEUR-BUILT AIRCRAFT AND ULTRALIGHT FLIGHT TESTING HANDBOOK This AC's purpose was the following: "(1) To make amateur-built/ultralight aircraft pilots aware that test flying an aircraft is a critical undertaking, which should be approached with thorough planning, skill, and common sense." "(2) To provide recommendations and suggestions that can be combined with other sources on test flying (e.g., the aircraft plan/kit manufacturer's flight testing instructions, other flight testing data). This will assist the amateur/ultralight owner to develop a detailed flight test plan, tailored for their aircraft and resources." The advisory circular provided guidance on preparing a plan for each phase of the amateur-built airplane's production. The areas for which guidance was provided included preparing for the airworthiness inspection, weight and balance, taxi test, flight testing, and emergency procedures. The suggested flight testing regimen was separated into 10-hour segments for the 40-plus hour flight testing requirement. Suggested guidelines for the experience level of the test pilot for the recently-completed amateur-built airplane were also provided. Among the guidelines, was the following: "A minimum of 50 recent takeoffs and landings in a conventional (tail wheel aircraft) if the aircraft to be tested is a tail dragger." "If appropriate, have logged a minimum of 10 tail wheel take-off and landings within the past 30 days." According to FAA Order 8130.2H, Airworthiness Certification of Products and Articles, "An experimental aircraft builder certificated as a repairman for this aircraft under 65.104, or an appropriately rated FAA-certificated mechanic, may perform the condition inspection required by these operating limitations."
The pilot's failure to perform an adequate preflight inspection, which resulted in a loss of control due to an improperly-rigged rudder. Contributing to the accident was the pilot's failure to implement and follow proper flight-testing plans.
Source: NTSB Aviation Accident Database
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