Pulkovo Flight 612: Final Minutes Before the Crash

On August 22, 2006, Pulkovo Aviation Enterprise Flight 612, a Tupolev Tu-154M registered RA-85185, was flying from Anapa to Saint Petersburg with 170 people aboard. The aircraft encountered a powerful thunderstorm system during the flight.

The crew attempted to avoid the weather by changing course and climbing. At about 15:33 Moscow time, they were cleared to climb to FL390. The aircraft reached the level shortly before the situation became critical.

Severe turbulence then produced a rapid change in the aircraft's flight path. Recorded data shows that the airplane was lifted thousands of feet within seconds. The crew disconnected the autopilot and continued in manual flight while the aircraft was being affected by strong vertical air movement.

The angle of attack increased dramatically while forward airspeed fell. The aircraft entered a deep stall, a particularly dangerous condition for a swept-wing aircraft with a T-tail. The crew transmitted distress information while attempting to recover.

The airplane descended rapidly and disappeared from radar near Donetsk in eastern Ukraine. All 160 passengers and 10 crew members were killed.

The weather was not the whole story

Early reports initially considered lightning and severe weather as possible explanations. Later investigation material identified the crew's handling of the aircraft in the severe turbulence and the resulting aerodynamic stall as the central sequence.

The accident demonstrates why attempting to climb above a convective system can become dangerous when the aircraft is already close to its performance limits. The Tu-154 encountered turbulence strong enough to drive the aircraft upward rapidly, while the subsequent manual-flight inputs allowed the angle of attack to increase beyond recoverable limits.

The final sequence unfolded in less than a few minutes. A normal passenger flight became a severe-weather emergency, then a loss-of-control event from which the crew could not recover.

Accident Facts

Recorded line: “The Tu-154M climbed to the cruise altitude of 35,100 feet (10.700 m).”

Sources

Interstate Aviation Committee investigation record — https://mak-iac.org/rassledovaniya/tu-154-ra-85185-22-08-2006/

FlightGlobal, August 22, 2006 — https://www.flightglobal.com/pulkovo-tu-154-aircraft-crashes-in-the-ukraine-killing-around-170/69178.article

FlightAware historical accident summary — https://www.flightaware.com/squawks/view/1/7_days/new/21572/Cockpit_crisis_In_five_years_over_50_commercial_airplanes_crashed_in_loss_of_control_accidents_What_s_going_on

https://www.youtube.com/watch?v=GEttyVzAfcc