What happened
On January 13, 2013, at approximately 14:40 local time, a Robinson R44 Raven II helicopter, registered YR-PRX and operated by SC Aero Taxi SRL, was involved in an accident during a commercial flight. The aircraft had departed from the LRPH heliport in Ariceștii Rahtivani, Prahova County, with plans to pick up a passenger at Balta Verde Airclub near Craiova. However, after the passenger canceled the transport, the pilot decided to return to the headquarters.
While flying south of the Târgoviște–Ploiești road in the area of Stoenești locality, the pilot encountered rapidly deteriorating weather conditions. Visibility dropped significantly due to dense fog and frozen haze. Deciding to land on an agricultural field to avoid continuing into the worsening weather, the pilot attempted a landing. During the approach, he lost visual contact with the ground, likely due to blown snow and the lack of contrast provided by the white snow cover. The helicopter struck the ground with its tail rotor, causing the tail beam to rupture and the aircraft to overturn onto its right side. The pilot evacuated the wreckage without injury.
The investigation
The AIAS investigation established that the helicopter was airworthy and the pilot held valid licenses and medical certificates. Meteorological data indicated that while conditions were good at departure, visibility in the accident area had dropped to approximately 0.5 km with a ceiling of 300–600 meters due to fog and wet snow. The ground was flat but covered by a thin layer of wet snow.
The investigation noted that the R44 Raven II is certified for VFR flight only and lacks IFR capabilities. The pilot, who had over 2,000 hours of experience, delayed the decision to land until visibility was critically low. The board found that the pilot did not review significant weather charts prior to the return leg, missing crucial information about the deteriorating conditions along his route.
Findings
The primary cause of the accident was the pilot’s erroneous assessment of flight conditions, which led to delaying the decision to land until safety was compromised. Contributing factors included:
- Rapid decrease in horizontal visibility due to fog and haze.
- Lack of visual reference caused by snow cover and blown snow.
- Operation of a VFR-only aircraft in deteriorating weather without IFR equipment.
- Failure to utilize available meteorological briefings for the return journey.
The pilot’s decision to postpone landing resulted in insufficient time to select a suitable landing site safely. The accident highlights the risks associated with continuing visual flight into known or forecasted deteriorating weather conditions, particularly when relying on visual references that may be obscured by environmental factors like snow and fog.
Safety action
No safety recommendations were issued following this investigation.