No fatalities

Yak-40 Crashes on Approach to Chardzhou Airport After Wake Turbulence Encounter (CCCP-87930)

Chardzhou, TurkmenistanLanding (descent or approach)

On March 20, 1979, a Yakovlev Yak-40 (registration CCCP-87930) operated by Aeroflot - Russian International Airlines was involved in an aviation accident near Chardzhou, Turkmenistan during landing or approach. No fatalities were reported. Investigators recorded the probable cause as: It was determined that the loss of control on short final was the consequence of wake turbulences caused by a Mil-Mi 6 helicopter that was preceding the Yak-40. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 2026-06-12Data APIEditorial standards

A Yak-40 crashed onto dachas during final approach to Chardzhou Airport after encountering wake turbulence from a preceding Mil-Mi 6 helicopter. All 35 occupants survived, with the flight engineer injured. Aircraft was destroyed.

Incident Overview

On final approach to Chardzhou Airport, a Yakovlev Yak-40 experienced a loss of control at an altitude of 30-40 meters. The aircraft banked left, lost height, and crashed onto several dachas located in the approach path. The impact resulted in substantial damage to the aircraft, rendering it beyond repair. Despite the severity of the accident, all 35 occupants survived. The flight engineer sustained injuries. No injuries were reported on the ground.

Sequence of Events

The aircraft was on a standard approach when, at low altitude, it suddenly banked left and descended uncontrollably. The descent continued until the airplane struck multiple residential structures (dachas) situated beneath the approach path. The collision destroyed the aircraft and damaged the buildings.

Investigation Findings

The official investigation determined that the loss of control occurred due to wake turbulence generated by a Mil-Mi 6 helicopter that had been operating ahead of the Yak-40. The controller responsible for managing approaches failed to maintain the required minimum separation between the helicopter and the following aircraft. Additionally, poor organization of air traffic control (ATC) services in Turkmenistan was cited as a contributing factor.

Aftermath

Emergency services responded to the crash site. All occupants were accounted for, with only the flight engineer needing medical attention for injuries. The aircraft was a total loss. The dachas involved sustained damage but no casualties occurred on the ground.

Probable cause

It was determined that the loss of control on short final was the consequence of wake turbulences caused by a Mil-Mi 6 helicopter that was preceding the Yak-40. Investigations revealed that the controller in charge of approaches failed to respect the minimum separation between the helicopter and the Yak-40. Poor organization of ATC in Turkmenistan was considered as a contributing factor.