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:

VFR flight into instrument meteorological conditions (VFR-into-IMC) is a common and often fatal general aviation accident cause, frequently leading to loss of control or controlled flight into terrain.
These accidents usually result from an "accident chain" of factors, including inadequate preflight weather briefings, external pressures, and misjudging conditions, rather than a single event.
A recent fatal crash illustrated these risks, where an experienced pilot, without obtaining a weather briefing, entered IMC and descended into mountainous terrain during an attempted turn.
Prevention emphasizes obtaining official weather briefings, honestly assessing pilot limitations, resisting external pressures, and ensuring adequate training for instrument conditions.

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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.