Casualties unknown

1991-09-01: Ryan NAVION (N4111K) — Donald V. Hanks — Chelan, WA

Chelan, WA, US

On September 1, 1991, a Ryan NAVION (registration N4111K) operated by Donald V. Hanks was involved in an aviation accident near Chelan, WA. Investigators recorded the probable cause as: The pilot's failure to maintain clearance while maneuvering after encountering a downdraft, which resulted in the right wing contacting the parking ramp. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards

A pilot encountered a downdraft shortly after takeoff, executed a turn that resulted in the right wing striking the parking ramp, but successfully returned for landing without further incident.

What happened

Shortly after initiating takeoff, the aircraft encountered a significant downdraft. To counteract the loss of altitude and increase airspeed, the pilot lowered the nose of the airplane. The pilot then executed a right turn, flying over nearby buildings, hangars, and the airport parking ramp.

During this maneuver, the airplane completed a 360-degree turn. Unfortunately, the right wing made contact with the parking ramp surface. Despite the impact, the pilot maintained control of the aircraft and continued to fly safely. The pilot successfully returned to the airport and landed without any further issues or incidents.

The investigation

The investigation focused on the immediate sequence of events following the encounter with the downdraft. Examination confirmed that the contact occurred between the right wing and the ramp surface during the low-altitude turn. No mechanical failures were reported prior to the event, and the pilot's ability to continue flying suggests the structural integrity remained sufficient for safe operation.

Findings

The primary factor in this incident was the encounter with a downdraft shortly after takeoff. The subsequent maneuver to regain airspeed resulted in proximity to ground obstacles. The pilot's decision to complete the turn and the resulting wing strike were direct consequences of the initial weather encounter and the corrective actions taken.

Safety message

Pilots should be aware that downdrafts can occur unexpectedly during takeoff and landing phases. Maintaining adequate clearance from ground obstacles, especially when maneuvering at low altitudes to manage airspeed or altitude, is critical for safety.

Probable cause

The pilot's failure to maintain clearance while maneuvering after encountering a downdraft, which resulted in the right wing contacting the parking ramp.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X18190. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.