Air Algérie Flight 5017

Air Algérie
Industry	Aviation
Founded	1947
Headquarters	Algiers, Algeria
Area served	International
Products	Passenger air transport
Website	www.airalgerie.dz

Air Algérie Flight 5017 (AH 5017) was an international passenger service operating between Ouagadougou, Burkina Faso, and Algiers, Algeria. On 24 July 2014, the flight crashed near Gossi, Mali. The aircraft, a McDonnell Douglas MD-83 twin-engine jet operated by Swiftair on behalf of Air Algérie, vanished from radar roughly fifty minutes after departure. Tragically, all 110 passengers along with 6 crew members lost their lives.

The French Bureau of Enquiry and Analysis for Civil Aviation Safety (BEA), supporting the Malian investigation authorities, released a detailed report in April 2016. Their findings indicated that while the aircraft was cruising under autopilot control, ice accumulation on the engines diminished thrust output, which led to a stall at high altitude. The flight crew was unable to regain control, resulting in the fatal crash. The BEA issued safety recommendations directed at Air Algérie, the US Federal Aviation Administration, and the governments of Burkina Faso and Mali. Until casualty figures from the 2023 Gao Ilyushin Il-76 crash are finalized, Flight 5017 remains the deadliest aviation disaster in Mali’s history.

Accident

Flight 5017 took off from Ouagadougou Airport at 1:15 local time (UTC) on 24 July 2014, with a scheduled arrival at Houari Boumediene Airport in Algiers at 5:10 local time.

The airplane reached its cruising altitude of FL310 (31,000 feet) within 22 minutes and achieved its planned speed of 280 knots indicated airspeed (IAS). Approximately two minutes later, the speed began to decrease gradually to around 200 knots while maintaining FL310. After some time, the aircraft started descending, with speed dropping further to about 160 knots. It then initiated a left turn and entered a rapid spiral descent. Flight data recording ceased at 1:47 at an altitude near 1,600 feet and a speed close to 380 knots. Seconds later, the aircraft impacted terrain at roughly 270 meters above sea level.

On 28 July, it emerged that the flight crew had initially requested a course deviation due to adverse weather conditions before asking to return to Burkina Faso. A mesoscale convective system was present in the area, prompting the aircraft to veer left of its planned route to avoid storm activity. Satellite imagery detected a light flare consistent with an impact near the edges of this weather system.

Early reports were inconsistent regarding the exact crash location. The flight path passed over Mali, with disappearance noted between Gao and Tessalit. French military forces located wreckage between Gao and Kidal in a remote desert zone and dispatched troops to secure the crash site. Malian President Ibrahim Boubacar Keïta confirmed debris was found between Aguelhok and Kidal. Additional accounts mentioned wreckage near Tilemsi, Mali, with Algerian, Burkinabe, and French officials providing differing specifics.

Aircraft

The aircraft involved was a McDonnell Douglas MD-83, bearing manufacturer’s serial number 53190 and line number 2148, equipped with two Pratt & Whitney JT8D engines. Its maiden flight occurred in June 1996, making it 18 years old at the time of the accident. Swiftair acquired the plane in 2012 and re-registered it as EC-LTV after previous service with carriers such as Flash Airlines and Avianca. In June 2014, it was wet-leased to Air Algérie to meet increased demand during the summer period.

At the time of loss, EC-LTV had completed approximately 32,000 flight cycles. The French Directorate General for Civil Aviation (DGAC) confirmed that the aircraft had undergone inspection in France shortly before the accident and was deemed "in good condition".

Passengers and crew

Individuals on board by nationality (according to Air Algérie)
Nation	Count
Algeria	6
Belgium	1
Burkina Faso	28
Cameroon	1
Canada	5
Egypt	1
France	52
Germany	4
Lebanon	6
Luxembourg	2
Mali	1
Nigeria	1
Spain	6
Switzerland	1
United Kingdom	1
Template:Noflag	116

Among the 110 passengers onboard, 52 were French nationals, with a minimum of 33 serving as French military personnel engaged in African operations, including three high-ranking intelligence officers. Additionally, a senior figure from Hezbollah traveling incognito was present. Passengers originated from countries such as Burkina Faso, Lebanon, Algeria, Spain, Canada, Germany, and Luxembourg. Several held dual or multiple nationalities; the Lebanese embassy estimated at least 20 Lebanese nationals among those aboard. One individual held both Chilean and French citizenship. The entire passenger list consisted of individuals en route to destinations in Europe, the Middle East, or Canada.

On 25 July, French President François Hollande confirmed that no survivors were found. By November 2014, all victims had been formally identified.

The flight crew comprised six Spanish nationals: Captain Agustín Comerón Mogio (aged 47), First Officer Isabel Gost Caimari (aged 42), and four flight attendants. Captain Comerón accumulated over 12,988 flight hours, including 10,007 on the MD-80 aircraft. Prior to joining Swiftair, he gained experience at Centennial and Spanair airlines and had extensive flying experience in Africa, participating in United Nations missions. Since commencing work with Air Algérie on 20 June 2014, he completed 45 flights amounting to approximately 100 hours.

First Officer Gost had logged 7,016 total flight hours, with 6,180 on the MD-80 model. Before joining Swiftair in June 2013, she served as a dispatcher and co-pilot at Spanair. She operated various African routes and had completed 43 flights totaling 93 hours with Air Algérie since June 2014.

Search effort

The crash site was discovered southeast of Gossi, Mali. United Nations personnel secured the area on 25 July. French media broadcast footage depicting scattered wreckage across a barren landscape without identifiable components such as the fuselage or tail section. A French Reaper drone stationed in Niger located the debris after receiving alerts from Burkinabé and Malian forces. French military units were the first responders at the scene. Burkina Faso’s Prime Minister, Luc Adolphe Tiao, reviewed video evidence and highlighted the challenges involved in victim identification.

Reactions

Given that a majority of passengers were French citizens, France declared three days of national mourning starting from 28 July, during which flags on all government buildings were flown at half-mast. Algeria also observed an official three-day mourning period.

Burkina Faso mourned its loss of 28 nationals by instituting two days of official mourning that included flag lowering and cancellation of public events. The Burkinabé Minister for National Security committed to government efforts aimed at determining the precise circumstances surrounding the crash.

In October 2014, Air Algérie retired flight numbers AH5016 and AH5017 as a tribute to those who perished. On 24 July 2015, a remembrance ceremony took place in Ouagadougou where families gathered to place flowers and light candles. Unidentified remains were scheduled for burial in Bamako, the capital city of Mali.

Investigation

Malian officials initiated a formal inquiry headed by the President of the Mali Commission of Inquiry, with technical assistance provided by the French Bureau of Enquiry and Analysis for Civil Aviation Safety (BEA).

On 27 July, investigators from the BEA arrived at the accident location to gather evidence. Both black boxes were retrieved, and data extraction from the flight data recorder (FDR) was successful. However, the cockpit voice recorder (CVR) suffered damage and, despite restoration attempts, its audio recordings remained unusable due to a malfunction unrelated to the crash impact. As a result, the investigation relied on alternative information sources such as air traffic control communications.

By 7 August, the BEA team had established its organizational framework—comprising three international units dedicated to "aircraft," "systems," and "operations"—and unveiled an initial reconstruction of the flight path. A preliminary report was planned for release in mid-September. Aviation analyst Gérard Feldzer highlighted that FDR data indicated the aircraft entered a stall amid adverse meteorological conditions.

The interim report published on 20 September provided detailed insights into the FDR data and clarified the CVR's limited functionality: it recorded over existing audio without erasing prior content, resulting in overlapping sound on a 32-minute tape. While some radio communications with air traffic control were partially intelligible, most cockpit dialogue remained inaccessible.

On 2 April 2015, BEA confirmed a consensus that erratic engine pressure ratio (EPR) readings emerged two to three minutes after leveling off at 31,000 feet. The EPR, essential for regulating engine thrust, was likely compromised by ice accumulation on sensors—a situation normally prevented by a hot-air anti-icing system which probably remained inactive during climb and cruise phases. These erroneous readings caused engine thrust limitations inadequate to sustain airspeed, leading to an increasing angle of attack until stall ensued. Approximately twenty seconds later, the aircraft abruptly rolled left and pitched downward; no stall recovery actions were recorded despite flight control inputs indicating nose-up and right-roll efforts.

The BEA referenced two previous analogous events involving MD-82/MD-83 aircraft where crews detected speed reduction and successfully recovered by activating anti-icing systems: Spirit Airlines Flight 970 in June 2002 and a Swiftair MD-83 incident in June 2014.

Logbook analysis

The French BEA uncovered several technical malfunctions on the aircraft, predominantly related to the EPR system. Significant issues included intermittent autothrottle malfunctions prompting replacement of the No.2 engine’s EPR transmitter in July 2013; a defective No.1 engine EPR gauge replaced in October 2013; and substitution of both the autothrottle actuator and left-hand EPR transmitter in early 2014. Furthermore, an engine surge occurred in June 2014 causing a rejected takeoff and necessitating replacement of the No.1 engine.

Sequence of events based on FDR analysis

Prior to departure from Ouagadougou to Algiers, the crew was aware of challenging weather conditions including turbulence and icing hazards. AH5017 departed at 01:15 local time without initial complications. Thirteen minutes after takeoff while ascending through flight level 215 (21,500 feet), the flight path veered slightly to circumvent a storm; however, the engine anti-icing system was not engaged despite environmental temperatures conducive to ice crystal formation. The lack of visible airframe icing likely influenced this decision.

At 01:37, autopilot and autothrottle systems were activated. Soon thereafter, inaccurate EPR readings from the right engine—likely caused by ice obstruction—led the autothrottle to reduce thrust below necessary levels, initiating a gradual deceleration. Within one minute, similar erroneous values appeared on the left engine’s EPR indicators. Despite these irregularities and declining speed, engine anti-icing was not activated nor was insufficient thrust recognized by the crew.

The aircraft’s velocity continued decreasing toward stall speed (approximately 210 knots). Although cockpit alerts such as "SPEED LOW" illuminated and autothrottle disengaged at 203 knots, crew response was delayed as they handled communications with Niamey ACC; autopilot remained engaged throughout. Upon reaching 200 knots, stall warnings activated but neither autopilot disconnection nor stall recovery maneuvers were initiated by the crew, suggesting unawareness of impending stall conditions.

Autopilot commands increased nose-up trim beyond stall angle limits (up to 24°), triggering multiple "STABILIZER MOTION" warnings. Both engines experienced surges with RPMs dropping near idle speeds—likely noticed by crew members. Autopilot disengaged twenty-five seconds after stick shaker activation at 162 knots while altitude decreased approximately 1,150 feet. The aircraft banked left with descending pitch; although crew inputs corrected roll deviations, they mistakenly maintained nose-up attitude instead of performing proper stall recovery until impact occurred.

Conclusion

On April 22, 2016, the BEA determined the accident’s cause: the autothrottle reduced speed due to blockage of the engine nose cone pressure sensors, most likely by ice crystals. To maintain altitude, the autopilot raised the angle of attack until the aircraft stalled and crashed at high velocity.

Factors that contributed included:

failure to activate engine anti-icing systems
blockage of Pt2 pressure sensors leading to inaccurate EPR readings and thrust levels falling below necessary values at FL310
crew’s delayed reaction to speed reduction and incorrect EPR data amid workload pressures and communication difficulties
ignoring buffet, stickshaker, and stall warnings
incorrect flight control actions that hindered stall recovery
outdated FCOM guidelines regarding anti-icing activation when Pt2 sensors are blocked
inadequate operator information about the risks of Pt2 sensor icing
delayed activation of stall warnings
autopilot logic commanding further pitch-up beyond stall angle, exacerbating the situation

The BEA issued more than 20 safety recommendations, reflecting issues previously seen in accidents such as West Caribbean Airways Flight 708 and Air France Flight 447. These recommendations covered Search and Rescue improvements, CVR malfunctions, and urgent FAA alerts related to aircraft icing.

Legal actions

Paris prosecutors launched an investigation for involuntary manslaughter. Families of Canadian victims filed a lawsuit against Air Algérie, accusing Swiftair pilots of choosing a dangerous route through a tropical storm and neglecting to engage de-icing systems, seeking compensation for damages and loss.

The judicial inquiry highlighted a chain of errors linked to failure of the de-icing system causing sensor icing and false engine data, resulting in unperceived thrust loss. Pilot error was noted in attempts to recover altitude. Crew training relied on simulators not fully representative of the MD-83 aircraft, with limited experience flying in Africa and weather updates received 2½ hours before departure amid communication challenges.

On May 18, 2021, the Paris Judicial Court ordered Swiftair to face trial in France for involuntary manslaughter and negligence, citing insufficient crew training as a factor in failing to recognize engine parameter degradation and stall response.

Although initially planned for October 2023, the trial was postponed indefinitely pending a ruling from the European Court of Justice (CJEU) on ne bis in idem (protection against double jeopardy) due to an earlier provisional dismissal in Spain. Families of victims expressed frustration over these judicial delays.

On April 3, 2025, the CJEU rejected the preliminary questions submitted by the Paris court concerning ne bis in idem, allowing French legal proceedings to proceed. Investigating judges concluded that Swiftair’s shortcomings—particularly inadequate training—played a role in the crash. This ruling clears the way for trial before the Paris Criminal Court.

Tribute

In 2019, the Paris City Hall commemorated the victims by dedicating an alley in Parc de Bercy as “allée des 116 victimes du vol AH5017 du 24 juillet 2014.”

The fourth anniversary on July 24, 2018, was marked by unveiling a memorial stele in Ouagadougou, Burkina Faso. The ceremony was attended by then-President Roch Marc Christian Kaboré, who also planted a memorial tree. This site offers families a place for remembrance and preserves the memory of all 116 victims.

The Association des Familles des Victimes du Crash (AFAVIC) in Burkina Faso continues to honor those lost. For both July 2023 and July 2024—the tenth anniversary—AFAVIC issued statements expressing grief and remembrance despite postponing planned events. The association also appealed to customary and religious leaders for eternal peace for the deceased.

External links