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CEN16LA184

2016-05-01 · Ponca City, Oklahoma, United States · Serious · 1 aircraft · Status: Completed

Airport PNC

Aircraft involved

Probable cause & findings

Maintenance personnel's improper installation of the elevator bolt, which resulted in a loss of elevator control during landing.

Factual narrative

On May 1, 2016, about 1130 central daylight time, a Cessna 150F, N8619G, experienced a loss of pitch control during landing flare and impacted runway 35 at Ponca City Regional Airport, Ponca City, Oklahoma. The airplane sustained substantial damage to the firewall. The pilot sustained serious injuries and the passenger was uninjured. The airplane was operated by the pilot under 14 Code of Federal Regulations Part 91 as a personal flight that was not operating on a flight plan. Visual meteorological conditions prevailed at the time of the accident. The local flight originated from PNC about 1045. The pilot stated that he performed a "full" preflight inspection of the airplane prior to departing for a pleasure flight. The flight returned without incident for an approach for landing to the airport. During landing flare on runway 35 and about 1-2 feet above runway, the airplane "shot up drastically". The airplane climbed about 10-20 feet, the pilot "gently" applied forward control pressure on the control yoke, and the airplane "instantly" pitched down and impacted the runway. The pilot stated that as he waited for an ambulance, he saw the left elevator was separated from the horizontal stabilizer. An airplane maintenance record entry dated November 9, 2015, shows that an annual inspection had been performed and that the bearing in the elevator bearing crank assembly was "reset" by an airframe and powerplant mechanic with inspection authorization. The airplane accumulated about 25 hours of flight time after the annual inspection. Post-accident examination of the airplane by a Federal Aviation Administration (FAA) inspector revealed that a bolt that links the left elevator to the control system was missing. The bolt was found inside the left elevator tip. The FAA Inspector reported that there was an improper reinstallation of the elevator, which resulted in it coming loose. The private pilot stated that, during the landing flare at the conclusion of a local flight, the airplane's nose "shot up drastically." The pilot "gently" pressed forward on the controls to lower the nose, and the airplane pitched down and impacted the runway. Examination of the airplane revealed that a bolt that attached the left elevator to the control system was not installed, and the FAA inspector reported that the bolt was found undamaged inside the elevator tip. According to the pilot, maintenance personnel had recently removed the left elevator, and it is likely that they failed to properly secure the bolt when they reinstalled the elevator. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

FAA avdata. C = Cause, F = Factor.

  • C Personnel issues-Task performance-Maintenance-Repair-Maintenance personnel - C
  • C Personnel issues-Task performance-Inspection-Post maintenance inspection-Maintenance personnel - C
  • C Aircraft-Aircraft systems-Flight control system-Elevator control system-Incorrect service/maintenance - C

Verbatim from NTSB's published report. Source file NTSB_2016_CEN16LA184.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

Matched on aircraft type or causal vocabulary (stall, maintenance). All research papers