Emergency Physician Paul Sokoloski, 57, Dies in Carlisle Plane-Helicopter Collision

Q: What crucial communication failure led a landing plane to strike a police helicopter at a non-towered Pennsylvania airport?

The key failure appears to have been a breakdown in pilot-to-pilot traffic coordination on the airport’s common traffic advisory frequency, or CTAF, at Carlisle’s non-towered field. Because Carlisle Airport has no control tower, arriving and operating aircraft must self-announce their positions and intentions on a shared radio frequency and rely heavily on visual separation. Authorities have said the State Police Bell 407 was off the runway, hovering or working over a grassy area during a training exercise, when the landing Cessna 150 veered at the last moment and struck the helicopter from behind. Investigators have not yet issued a final cause, but the crucial issue raised by the circumstances is whether the Cessna pilot and the helicopter crew adequately heard, made, or understood each other’s CTAF calls and relative positions. At a non-towered airport, there is no controller to sequence traffic or warn of conflicts; safe operations depend on standard radio calls, predictable traffic patterns, and see-and-avoid. That makes the likely communication failure not a breakdown with air traffic control, but a failure of shared situational awareness between the two aircraft at an uncontrolled airport. The FAA and NTSB investigations are expected to determine whether missed, absent, blocked, or misunderstood CTAF transmissions contributed to the collision.

3 articles · Updated · News Item · Aug 21

Paul W. Sokoloski, 57, was pronounced dead at the scene after the Cessna 150 he was piloting collided Wednesday evening with a Pennsylvania State Police helicopter at Carlisle Airport.
Carlisle authorities identified Sokoloski as an emergency physician with Penn State Health and a 1987 graduate of Shamokin Area High School.
The helicopter had been on a routine training flight, and two state police pilots aboard were injured in the crash, with one later discharged.
FAA and NTSB investigators are examining the collision, which earlier reports said occurred when the Cessna struck the Bell 407 from behind while it was hovering.