On February 20, 1984, a Cessna 177B (registration N34849) was involved in an aviation accident near Lucerne, CA. Investigators recorded the probable cause as: The pilot's inadvertent entry into IFR conditions while searching for a VFR descent path, compounded by the absence of an instrument approach procedure at the destination airport. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A pilot flying to a destination without an instrument approach inadvertently entered IFR conditions while searching for a visual break in the cloud layer, resulting in a collision with trees.
What happened
Upon arriving at the intended destination, the pilot was unable to locate the airport due to a solid lower layer of clouds obscuring visibility. While actively searching for a break in the cloud cover to facilitate a visual descent under VFR rules, the pilot inadvertently entered instrument flight rules (IFR) conditions. The aircraft subsequently impacted trees.
Findings
There was no instrument approach procedure available at the destination airport. The accident occurred because the pilot attempted to maintain visual contact with the ground in deteriorating weather conditions without a published instrument approach to fall back on.
Probable cause
The pilot's inadvertent entry into IFR conditions while searching for a VFR descent path, compounded by the absence of an instrument approach procedure at the destination airport.