Continued VFR Into IMC

It’s a long-term problem and, despite training and warnings, too many pilots still become its victim.

Joseph E. (Jeb) Burnside

Friday, February 21, 2025 at 05:00 AM ET

Verified

Key Takeaways:

Continued VFR flight into instrument meteorological conditions (IMC) remains a prevalent and often fatal cause of general aviation accidents, frequently resulting in loss of control or controlled flight into terrain.
These accidents are typically the culmination of an "accident chain," involving factors such as external pressures, a lack of comprehensive preflight weather briefings, and pilots exceeding their skill limitations, as illustrated by a fatal Cessna 150 crash.
Prevention emphasizes rigorous preflight weather planning, resisting external pressures that compel flight in hazardous conditions, honest self-assessment of pilot proficiency, and continuous training to effectively utilize aircraft systems and make timely in-flight decisions.

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Over the years I’ve been paying attention to such things, one of the most common accident causes among general aviation operations is continued VFR flight into instrument conditions, typically followed by in-flight loss of control (LOC-I) or controlled flight into terrain (CFIT). Or both. It’s long been a sobering, go-to, all-encompassing crash finding among accident investigators.

Improved flight instrumentation and situational awareness devices—along with reliable autopilots for those VFR-only pilots willing to break a few rules—seem to have reduced their frequency over the years, especially since the days when the typical personal airplane lacked either a full set of flight instruments or reliable navigation equipment. But VFR-into-IMC accidents still happen and, when they do, they’re more likely than many other accident causes to be fatal.