S7 Airlines Flight 778

S7 Airlines Flight 778

Company type	Scheduled domestic passenger flight
Industry	Aviation
Headquarters	Moscow , Russia
Area served	Domestic Russia (Moscow to Irkutsk)
Products	Passenger air transport

S7 Airlines Flight 778 (S7778/SBI778) was a scheduled domestic service connecting Moscow and Irkutsk, Russia. On 9 July 2006 at 06:44 local time, the Airbus A310-324 operating this flight overran the runway upon landing in Irkutsk. The aircraft failed to decelerate properly, breached the airport’s concrete boundary fence, collided with private garages, and caught fire, resulting in 125 fatalities.

This incident stands as the deadliest accident in S7 Airlines’ history. It also marked Russia’s second significant aviation catastrophe within a two-month span, following the crash of Armavia Flight 967.

The Interstate Aviation Committee (MAK) investigation attributed the accident to pilot error. During the process of decreasing thrust reverser on the right engine, the captain inadvertently pushed forward the throttle of the left engine, producing substantial forward thrust. The co-pilot neglected to monitor engine settings, which hindered timely detection and correction of the problem. Consequently, the aircraft overran the runway and crashed.

Aircraft

The aircraft involved bore registration F-OGYP, formerly N812PA, with Manufacturer Serial Number 442. Initially delivered to Pan Am in June 1987, it was transferred to Delta Air Lines following Pan Am’s bankruptcy in 1991. Subsequently, it was handed over to Aeroflot in March 1995 and ultimately acquired by S7 Airlines in July 2004. This Airbus A310 had accumulated more than 52,000 flight hours over upwards of 10,000 flights and was equipped with two Pratt & Whitney PW4152 engines.

Passengers and crew

Onboard persons by nationality

Nationality	Passengers	Crew	Total
Russia	181	8	189
Germany	3	0	3
China	3	0	3
Poland	2	0	2
Belarus	3	0	3
Moldova	2	0	2
Azerbaijan	1	0	1
Total	195	8	203

A total of 203 individuals were on board, comprising 195 passengers and eight crew members (two pilots and six flight attendants). The passenger manifest included numerous children—14 under twelve years old—traveling to a vacation destination near Lake Baikal. Besides Russian nationals, there were fourteen passengers from Germany, China, Belarus, Moldova, Poland, and Azerbaijan.

Among those on board were Maria Rasputin, daughter of Russian author Valentin Rasputin, and Sergei Koryakov, who served as head of the Federal Security Service (FSB) for the Irkutsk region.

The flight captain was Sergey Gennadievich Shibanov, aged 45. Employed by the airline since June 2005, he had logged a total of 10,611 flight hours, including 1,056 hours on the Airbus A310. Captain Shibanov graduated from Ulyanovsk Institute of Civil Aviation in 1991 and had been operating the A310 since May 2005.

First officer Vladimir Grigoryevich Chernykh was aged 48 and possessed a total of 9,771 flight hours with only 158 on the A310. He graduated from Kirovograd Civil Aviation Flight Academy in 1983 and completed his Airbus A310 conversion training in April 2006 before assuming his role as co-pilot in May that year.

Flight

S7 Airlines Flight 778 was operating a route from Moscow's Domodedovo International Airport to Irkutsk, an important Siberian hub served by Irkutsk International Airport, located near the renowned tourist attraction Lake Baikal. This route ranked among Russia's busiest, particularly in July when summer travel peaks.

On 9 July 2006, Flight 778 was set to depart Domodedovo at 20:15 Moscow Time, carrying 195 passengers and 8 crew members, including Captain Shibanov and First Officer Chernykh. The plane lifted off at 20:17, heading toward Irkutsk with Bratsk Airport designated as an alternate landing site in case of fog. The anticipated arrival time was 06:44 Irkutsk Time.

At 06:16, following clearance from air traffic control, the crew initiated descent from an altitude of 5,700 meters. During this phase, they activated the engines’ anti-icing system and subsequently engaged wing anti-icing for a minimum of three minutes. Weather conditions reported included visibility of 3,500 meters, light rain, and cumulonimbus clouds. Coordination with Irkutsk air traffic controllers ensured approach clearance.

In the final approach segment, the aircraft aligned with the glide path, completed the landing checklist, and configured for touchdown. After disengaging autopilot and autothrottle systems, pilots corrected a minor rightward deviation by adjusting the elevator controls, which triggered a brief "sink rate" warning.

Flight 778 touched down on Runway 30 at Irkutsk at 06:43, maintaining an airspeed of 132 knots.

Accident

Immediately following touchdown, Captain Shibanov activated the spoilers and set the aircraft’s autobrake system to low. The reverse thrust lever for the right engine was pulled fully back; however, the left engine’s reverse lever remained untouched. To decelerate, Captain Shibanov increased reverse thrust on the right engine. During the landing roll, a take-off warning unexpectedly sounded regarding the aircraft’s configuration. The crew regarded this as a false alarm. First Officer Chernykh attempted to clear the warning from the cockpit monitor (ECAM) and confirmed that Flight 778 had landed safely. Air traffic control granted clearance to vacate the runway via taxiway 6.

Despite completing post-landing procedures, instead of slowing down as expected, the aircraft accelerated along the runway with only approximately 800 meters remaining. Upon inquiry from Captain Shibanov about the situation, First Officer Chernykh reported rising RPM. In response, Shibanov ordered maximum deployment of the right engine’s thrust reverser again while applying full braking force.

07:44:18	Captain	What is happening?
07:44:18	First officer	Speed is increasing
07:44:19	Captain	Reverse thrust again!
07:44:20	First officer	We’re leaving the runway!

Despite these efforts, the aircraft failed to decelerate and began running out of runway space. The excessive speed caused flight systems to disengage both spoilers and autobrakes.

Airport fire personnel observed Flight 778’s unusually high speed and followed it while alerting emergency responders at the airport. Meanwhile, air traffic controllers noted that the aircraft was not slowing down as expected.

Inside the cockpit, confusion increased as the plane veered left; attempts to correct with rudder pedals were unsuccessful and it drifted off to the right side of the runway onto grassy terrain at approximately . In desperation, Captain Shibanov commanded engine shutdown.

07:44:27	First officer	Why?
07:44:28	Captain	I don’t know.
07:44:31	First officer	Oh no!
07:44:32	Captain	Shut down engines!
07:44:34	Commentary	Sounds consistent with leaving prepared surface.
07:44:37	Commentary	Noise of initial impact.
07:44:40	Commentary	Multiple impact sounds.
07:44:41	Commentary	Recording ends.

The left engine struck an Instrument landing system localizer#airport's localizer beacon antenna and adjacent fencing before crossing a roadway and colliding with the airport’s concrete perimeter fence at a speed of 97 knots (180 kph). This collision caused collapse of the nose landing gear, separation of engines from their pylons, and severing of the left wing. Fuel ignited upon impact resulting in a large fire and loss of cabin lighting. The aircraft then crashed into rows of private garages before coming to rest. One passenger died instantly; others sustained injuries but survived.

Rescue operation

Following the aircraft's collision with the perimeter fence and subsequent ignition, the observer promptly notified the airport's firefighting units. Personnel in the air traffic control tower observed the explosions and quickly alerted emergency response teams. An alarm was sounded across the entire airport, resulting in a complete suspension of all operations.

Within the cabin, dense smoke combined with leaking fuel intensified the fire's rapid expansion. The impact had demolished both front entry doors and torn away sections of the floor nearby. One flight attendant located on the right side was rendered unconscious, while another at the left front door, trapped by flames, unbuckled her seatbelt and escaped after a three-meter fall, suffering burns but surviving.

Passengers panicked as they rushed toward exits. Those seated in the forward business and economy sections evacuated through breaches in the right sidewall created by the crash. Two flight attendants attempted to open overwing emergency exits: the left door was inaccessible due to fire, causing one attendant to succumb to carbon monoxide poisoning; however, the right door was successfully opened, allowing passengers to evacuate onto the wing and adjacent rooftops.

At the rear of the aircraft, metal meal trays fell onto a flight attendant positioned at the right rear door; she managed to free herself and assist others in evacuating. Although containers blocked the right rear door, the left rear door was opened; unfortunately, its evacuation slide had been severed by debris, forcing passengers to jump from a considerable height.

Evacuation efforts were hindered by smoke and fire, compelling some passengers to crawl to safety. The initial firefighting vehicle arrived within 15 seconds of ignition; by 65 seconds after, 67 passengers had been evacuated. Additional fire trucks reached the scene within minutes. Rescuers forced open the obstructed right rear door, enabling 11 more passengers to escape before flames necessitated withdrawal. Authorities subsequently secured and cordoned off the crash area.

Broadcast footage revealed that only the tail section remained intact amidst smoldering wreckage. Firefighters from five different stations required two hours to fully extinguish the blaze.

Casualties

Among 203 individuals onboard, 125 lost their lives: five crew members and 120 passengers, including both captain and first officer. Autopsies determined that 119 passengers died due to carbon monoxide inhalation, while one female passenger succumbed to severe head injuries. By 20 July, authorities had identified 109 bodies. Only a single flight attendant could be identified owing to extensive charring.

Seventy-eight people survived—comprising 75 passengers and three flight attendants—including six children. Sixty survivors were admitted to hospitals in Irkutsk; of these, 38 sustained serious injuries and 22 minor ones. Eight patients were transferred to Moscow for advanced care; six remained in critical condition, including a ten-year-old child. Fourteen survivors reportedly declined medical treatment.

Survivors attributed their rescue to a flight attendant who opened a rear emergency exit. Two Polish passengers located in the tail section escaped without assistance; one sustained a leg injury. Chinese officials reported one citizen from Inner Mongolia survived with burns while two others remained unaccounted for. Russian media reported treatment of two Polish, two Belarusian, two German, and one Azerbaijani nationals in Irkutsk hospitals. The Belarusian embassy confirmed three of its citizens were injured in the incident.

Response

Authorities set up a crisis center at Moscow’s Domodedovo International Airport to support the relatives of the victims, with ambulances ready and social workers providing assistance to families. S7 Airlines arranged transportation flights to Irkutsk specifically for the victims’ families. The Ministry of Emergency Situations sent psychologists, medical teams, and supplies to Irkutsk to aid those affected.

The Presidential envoy representing the Siberian Federal District confirmed that financial aid and other forms of support would be provided to the victims and their families. Compensation packages included ₽100,000 rubles for families of those who lost their lives and ₽50,000 rubles for those injured, funded by the Irkutsk Oblast administration along with contributions from S7 Airlines. Medical treatment costs were covered, and voluntary donations totaling 35 million rubles were allocated among the affected.

Following the crash, Russian prosecutors initiated a criminal investigation. President Vladimir Putin expressed his condolences, mandated a thorough investigation, and declared 10 July as a national day of mourning. Flags were flown at half-mast across the country, and entertainment events were suspended nationwide. Patriarch Alexy II provided spiritual comfort, with a memorial service held at Moscow’s Cathedral of Christ the Saviour. Officials in Irkutsk announced intentions to erect a commemorative stone at the accident location, along with plans for additional memorials.

The two pilots were laid to rest in Irkutsk on 14 July. In December 2006, flight attendant Viktoria Zilberstein was honored by the Federation of Jewish Communities of Russia for her courageous actions during the evacuation.

Investigation

The investigation into the crash was led by Russia’s Interstate Aviation Committee (MAK), with assistance from agencies including the Federal Service for Supervision of Transport (Rostransnadzor), Federal Air Transport Agency (Rosaviatsiya), Rosaeronavigatsiya, Irkutsk Airport authorities, Aeroflot, and S7 Airlines. Airbus, as the aircraft manufacturer, dispatched technical experts to support the inquiry. Accredited representatives from France’s BEA, the U.S. NTSB, Germany’s BFU, and Pratt & Whitney also participated.

Both flight recorders—the cockpit voice recorder and flight data recorder—were recovered on 9 July. While the cockpit voice recorder remained undamaged, the flight data recorder sustained external damage that required meticulous data extraction efforts. On 10 July, both devices were transported to Moscow for decoding, resulting in high-quality data retrieval.

Early findings pointed toward brake malfunction as a potential cause. The Ministry of Emergency Situations reported that the aircraft had departed from the runway at high velocity. Although pilots had communicated successful landing prior to losing radio contact, Russian prosecutors suggested that human error or mechanical failure were probable factors. Transport Minister Igor Levitin highlighted wet runway conditions and acknowledged technical failure as among possible causes.

Airbus confirmed that the aircraft had been properly maintained, noting its most recent routine A Check occurred on 1 June 2006 and a comprehensive C Check was completed on 12 July 2005 in Frankfurt.

Defective aircraft

At first, the crash of Flight 778 was informally attributed to mechanical faults, with brake malfunction frequently mentioned by media outlets. Russian state-affiliated sources indicated brake issues during landing, while FlightGlobal highlighted Russian pilots' conjecture about asymmetrical thrust reverser operation. The airplane touched down within the designated runway zone but then swerved right and left off the paved surface. Survivors recounted that the aircraft initially decelerated before unexpectedly accelerating. Investigators determined that either pilot error or technical malfunction was the probable cause.

The maintenance records revealed the plane had undergone a comprehensive "C check" in Germany the previous July. From June to July 2006, fifty defects were logged; twenty-nine were corrected before the subsequent flight, while others were deferred yet remained compliant with the minimum equipment list (MEL). Prior to July 8, an additional five defects emerged; four were addressed before the July 9 flight. Importantly, the left thrust reverser was nonfunctional and one flap retraction mechanism was inoperative—both unresolved at the time of impact.

Although these issues existed, brake functionality was verified, ruling out brake failure as a causal factor. The disabled left thrust reverser adhered to MEL guidelines; provided pilots avoided reverse thrust on that engine, a safe landing should have been achievable. No other critical faults accounted for the runway excursion.

Investigators found analogous cases involving Airbus A310-300 aircraft with deactivated thrust reversers experiencing unanticipated forward movement upon landing. One incident involved a Mahan Air A310 overrunning its runway in Tehran. Additional examples included a 1982 United Airlines DC-10 landing on a wet surface where one engine generated forward thrust despite reverse thrust application, resulting in loss of control and runway departure with injuries.

These occurrences were linked to pilot mistakes—specifically, inadvertent throttle lever advancement causing unintended forward thrust and subsequent loss of control. Given these similarities to Flight 778, investigators stressed examining pilot inputs during landing to identify contributing elements.

Touchdown in Irkutsk

Flight 778 touched down at Irkutsk at 06:44 local time on a runway reported wet but deemed safe by ATIS. Upon touchdown, the crew activated spoilers and autobrakes to reduce speed before engaging thrust reversers. Captain Shibanov pulled the right engine’s reverse thrust lever fully back, while the left engine’s reverser remained disabled and disengaged.

According to Airbus and S7 Airlines’ minimum equipment list, pilots were required to hold the lever of any deactivated reverser at idle to prevent accidental forward movement. However, S7 Airlines did not provide targeted training for this specific condition. Flight data revealed that as the right reverser lever was pulled back, the left throttle lever unintentionally moved forward in tandem.

Shortly after landing, when the crew attempted to decrease reverse thrust by pushing the right lever forward, the left throttle also advanced simultaneously. Initially, this halted unintended motion and set the right reverser to idle. The crew then reapplied reverse thrust on the right engine, causing the left throttle to match again. When reducing reverse thrust once more, the left throttle moved further forward, generating approximately 60% forward thrust while the right engine’s reverser stayed idle.

This unintentional forward thrust from the left engine caused acceleration resembling takeoff conditions. The Airbus takeoff system detected this anomaly and issued a warning due to improper landing configuration. The pilots dismissed it as a system malfunction and attempted to clear the alert from their display.

First Officer Chernykh reported a smooth landing but soon observed increasing speed. He applied full reverse thrust on the right engine; however, Airbus safety systems negated this command because of substantial forward thrust from the left engine. The right engine’s reverser doors failed to unlock, leaving thrust at an idle forward setting and rendering Chernykh’s input ineffective. Captain Shibanov applied maximum braking force, stabilizing speed but unable to halt forward movement.

The asymmetric thrust—significant forward power from the left engine combined with idle on the right—caused lateral drift to the right. Pilots applied excessive left rudder input, overcorrecting and resulting in a sudden drift leftward. A minor right rudder adjustment then produced an abrupt turn rightward, surprising the crew who again applied full left rudder without success.

The aircraft departed from the runway surface. Captain Shibanov instructed First Officer Chernykh to shut down engines; however, this command was not carried out. With engines still running, thrust from the left engine continued unabated, preventing deceleration. Consequently, the aircraft overran the runway and crashed.

Unintentional thrust application

Analysis of flight recorder data indicated that the thrust lever for the left engine was inadvertently moved by the flight crew, most likely by Captain Shibanov, who was controlling the aircraft at that time. This event coincided with a reduction in reverse thrust on the right engine.

Captain Shibanov, seated on the left side as the pilot flying, had to reach across to manipulate the right engine’s reverse thrust lever located on the right. While pushing this lever forward to decrease reverse thrust, it is probable that his hand rested on the left engine throttle lever, unintentionally advancing it simultaneously.

Typically, moving the throttle lever requires a significant amount of force due to friction created by the coupling between the throttle and engine control. However, in this instance, the lever shifted with minimal effort because this coupling had deteriorated. This friction mechanism is adjustable during routine inspections, which are generally conducted only when pilots report issues with lever resistance. The aircraft’s maintenance records revealed no history of friction adjustment or inspection throughout its operational life.

According to guidance from the EASA, reduced friction within throttle linkages does not constitute an airworthiness concern justifying fleet-wide checks unless ongoing problems are documented.

The aircraft involved, registered F-OGYP, was considered aged. Due to the absence of friction adjustment procedures, the coupling had degraded substantially, lowering the force needed to move the throttle by approximately 400 grams—about one-third of the acceptable threshold. This explained why a slight touch resulted in significant throttle displacement.

Despite this ease of movement, such a large throttle change—reaching up to 60% thrust—should have been noticeable to Captain Shibanov. Simulations demonstrated that on uneven surfaces like Irkutsk’s runway, vibrations and deceleration effects could obscure these movements more than on smooth runways.

Investigators determined that sufficient runway length and time were available for corrective measures to avoid the accident. Although wet runway conditions were present, appropriate pilot response could have ensured safe deceleration and prevented the crash.

Psychological condition of crew

During landing and slowing down, the flight crew likely experienced premature mental mobilization, a psychological phenomenon characterized by diminished vigilance and emotional distraction despite incomplete operational tasks. In Flight 778’s case, pilots reduced their focus too early after touchdown while still needing to taxi to the apron.

This decline in alertness contributed to inadequate monitoring when the left engine throttle unintentionally advanced, causing unexpected acceleration. First Officer Chernykh, responsible for scanning instruments, did not notice this throttle movement. Although a take-off configuration warning was activated by the system, the crew dismissed it as a false alert due to its improbability during landing. Chernykh attempted multiple times to clear this warning using ECAM controls.

Eager to finalize the flight procedure, Chernykh informed air traffic control that landing was successful despite insufficient deceleration. With most of the runway consumed, mounting pressure intensified as slowing down became critical, resulting in panic.

Psychological evaluations revealed Captain Shibanov had an emotionally intense personality and was susceptible to stress-induced confusion. Under pressure, he became disoriented and issued an unclear command to shut down engines approximately seven seconds before impact.

Chernykh did not carry out this shutdown instruction, possibly due to stress paralysis or because he was accustomed from previous experience with aircraft equipped with flight engineers who managed such tasks. Expecting a flight engineer’s intervention in the cockpit that was not present, he failed to act, leaving engines running until collision occurred.

S7 safety culture

The investigation explored whether organizational elements within S7 Airlines played a role in the crash, uncovering significant issues in the airline’s safety culture. S7 introduced the Airbus A310 into its fleet in July 2004, increasing flight operations alongside fleet expansion. Despite growth, the airline experienced a notable rise in incident frequency; when compared to Aeroflot’s A310 operations, S7 recorded twice as many incidents per flight hour and maintained a safety standard roughly one-quarter as effective.

The rapid growth created a surge in demand for spare parts, but inventory levels were inadequate and customs delays worsened shortages. As a result, S7 adopted deferred defect procedures—transferring faulty components between aircraft to keep them flying. The accident aircraft, registered F-OGYP, had recently been subjected to such maintenance: on 6 July 2006, it operated with a malfunctioning right engine thrust reverser; after landing, the left engine reverser failed. Repairs involved cannibalizing parts from the left engine to fix the right one, leaving the left reverser non-functional and classified as a deferred defect when the plane returned to service on 8 July.

Although these deferred defect practices complied with Russian regulations and S7’s minimum equipment list, they suffered from inadequate regulatory oversight. Russian aviation authorities applied lenient supervision, permitting defects to accumulate unchecked. Investigators identified 86 defects across the Airbus A310 fleet during the first half of 2006 alone, representing significant hazards to operational safety.

Pilot training shortcomings were equally problematic. Captain Shibanov was promoted directly to A310 captain without prior experience as a first officer on this aircraft type—a highly unusual step contrary to typical career progression standards. The conversion training provided was insufficient; moving from the four-person Tupolev Tu-154 cockpit environment to the two-person A310 cockpit demanded robust cockpit resource management (CRM), which was not adequately emphasized, increasing risks of communication breakdowns and teamwork deficiencies.

Additional concerns emerged from psychological evaluations of Captain Shibanov. The MAK characterized his conversion as "insufficiently justified," noting psychological tests showed he exhibited emotional instability, anxiety, and susceptibility to stress. Medical records documented several heart-related conditions potentially exacerbated by stress. Despite recommendations for psychological support, negative findings were omitted from official reports that ultimately approved him for conversion training and flight responsibilities.

Conclusion

The MAK’s comprehensive final report, issued in 2007 in both Russian and English versions, determined that the crash of Sibir Airlines’ Airbus A310 F-OGYP was caused by incorrect and uncontrolled crew actions during rollout after landing with one thrust reverser deactivated. The Captain mistakenly advanced the left engine throttle from idle to forward thrust while attempting to engage reverse thrust on the right engine, whose reverser was operational. The Co-pilot’s failure to adequately monitor this situation prevented corrective measures such as reducing throttle or shutting down engines despite having enough time to intervene.

In response, MAK presented 57 recommendations directed at Russian aviation regulators, S7 Airlines, Airbus, EASA, IATA, ICAO, and Domodedovo Airport authorities. Among these were calls to prohibit using thrust reversers if one is defective, streamline customs procedures for importing spare parts, address risks related to inadvertent thrust lever movement, and develop explicit procedures for reverse thrust operations. Additionally, MAK urged ICAO to consider mandating cockpit video recording systems.

Aftermath

By July 2007, the lead criminal inquiry into the accident had been finalized, with deadlines extended until September 2008 to accommodate further examinations. The East Siberian Transport Department of the Investigative Committee officially closed the case in March 2010.

A tribute to those who lost their lives stands near the crash location on Mozhaisky Street. In July 2015, a memorial ceremony was conducted, attended by victims’ relatives along with officials from Irkutsk Airport and S7 Airlines.

See also

• TAM Airlines Flight 3054, a Brazilian aviation catastrophe resulting from hydroplaning and the deactivation of engine thrust reversers.

External links

• Interstate Aviation Committee
  • Investigation summary
    • Comprehensive accident report – English version provided by the Bureau of Enquiry and Analysis for Civil Aviation Safety (BEA).
  • Investigation summary – Official Russian edition
    • Final report
• Bureau of Enquiry and Analysis for Civil Aviation Safety
  • "Irkutsk accident on 11 July 2006."
• Official statement from S7 Airlines
• Multimedia