The National Transportation Safety Board released a preliminary report on the August 19 midair collision at the Carlisle, Pennsylvania airport, concluding that neither aircraft involved showed any evidence of mechanical malfunction. The accident claimed the life of 57‑year‑old emergency‑room doctor Paul Sokoloski, who was piloting a Cessna 150, and left two Pennsylvania State Police pilots seriously injured.
What the investigation revealed
Investigators examined the Cessna 150 private plane and the Bell 407 police helicopter and wrote that “no evidence of any pre‑impact mechanical malfunctions or failures that would have precluded normal operation” was found. The helicopter was on a training mission, hovering just feet above the grass beside the runway when the Cessna struck it.
Pilot communication on a non‑tower airport
Carlisle’s airport does not have an air‑traffic control tower, so pilots must coordinate on a shared radio frequency. The report includes the only known exchange between the two pilots before the crash. The Cessna pilot asked whether he should extend his “downwind” leg – the portion of the traffic pattern parallel to the runway – and the helicopter instructor advised, “Yes, extend your downwind.” The Cessna pilot acknowledged and confirmed he was second in line to land.
Thirty seconds after the helicopter passed the runway’s end, the Cessna followed, flying low over the runway without touching down. Its wings rocked side‑to‑side, the aircraft pitched up and down, turned right, and collided with the hovering helicopter. The NTSB notes that only about eight seconds elapsed between the helicopter moving off the runway and the impact.
Possible role of rotor wash
Investigators are still studying whether rotor wash – the down‑wash created by the helicopter’s blades – may have affected the Cessna’s stability. While the preliminary report does not assign blame, it cautions that it is too early to determine if rotor wash contributed to the accident.
Next steps in the investigation
The NTSB’s preliminary findings are only the first step. A final probable‑cause report is expected within one to two years, after a thorough analysis of all flight data, witness statements, and environmental factors. Until then, the board will continue to gather evidence and interview witnesses.
Community impact
The tragedy has resonated deeply with the Carlisle community and the broader Pennsylvania State Police family. Local officials have expressed condolences to Dr. Sokoloski’s family and praised the bravery of the police pilots who were conducting a training mission at the time.
For families and pilots alike, the incident underscores the importance of clear communication on non‑towered fields and the need for ongoing safety training. As the investigation proceeds, the NTSB’s transparent approach aims to provide answers that can help prevent similar accidents in the future.
Original reporting: KTVZ (Central Oregon) — read the source article.
