No fatalities

18 Sep 2021: CESSNA 404 (N5409G) — RICHLAND AVIATION — Sheridan, WY

Sheridan, WY, United States

On 18 Sep 2021, a CESSNA 404 (registration N5409G) operated by RICHLAND AVIATION was involved in an aviation accident near Sheridan, WY. No fatalities were reported. Investigators recorded the probable cause as: The pilot experiencing an episode of impaired behavior and incapacitation for reasons that could not be determined based on the available information. This summary draws on records from NTSB; 5 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 1778583330Data APIEditorial standards

A Cessna 404 cargo flight was substantially damaged after a landing gear collapse on Runway 15 near Sheridan, Wyoming; the pilot was not injured.

Accident Description

On September 18, 2021, at approximately 0750, a Cessna 404, registration N5409G, was substantially damaged during a landing accident near Sheridan, Wyoming. The airplane was being operated as a Title 14 Code of Federal Regulations Part 135 scheduled cargo flight. The pilot, who was the sole occupant, reported no injuries.

Flight and Loading Details

The pilot stated that he loaded the airplane with assistance from ground handlers and confirmed that no hazardous materials (HAZMAT) were presented during loading. The total cargo weight was 154 pounds, stowed behind a net in the aft cargo area. The flight and landing approach were described as uneventful. The pilot recalled configuring the airplane for landing by extending the landing gear and flaps.

Sequence of Events

After beginning the landing flare, the pilot's next recollection was being in the airplane on the right side of the runway, surrounded by a cloud of dust. He had no memory of how the airplane arrived at that location.

Examination Findings

Examination of the accident site revealed that the airplane had departed Runway 15 shortly after landing. The landing gear had collapsed, and the nose structure was deformed. The runway surface showed a set of gouges matching the dimensions of the right wheel rim, along with two sets of slash marks consistent with propeller strike.

Pilot Medical Information

The pilot declined emergency medical treatment at the scene. Three days later, he visited his personal physician, complaining of back and neck pain. His vital signs, including pulse oximetry, were normal. He recounted the accident circumstances to the physician and expressed concern about his inability to recall the events. The medical record noted, “He does not believe he lost consciousness but is unclear.”

The physical examination was unremarkable. A chest X-ray showed patchy infiltrates, and the pilot tested positive for COVID-19 the following day. Blood tests were normal, and a brain MRI performed on October 11, 2021, revealed no acute findings.

Pilot Medical History

At his last FAA medical examination, the pilot reported remote surgeries and seasonal allergies without any medication use. According to personal medical records, in February 2021, he reported gastroesophageal reflux disease and the use of omeprazole for treatment.

Contributing factors

Pilot