Accident | |
---|---|
Date | 18 May 2016 |
Summary | Runway overrun due to engine failure and pilot error |
Site | Dwyer Airport, Lashkargah, Afghanistan |
Aircraft | |
Aircraft type | Antonov An-12 |
Operator | Silk Way Airlines |
IATA flight No. | ZP 4K-AZ25 |
ICAO flight No. | AZQ 4K-AZ25 |
Call sign | SILK LINE 4K-AZ25 |
Registration | 4K-AZ25 |
Flight origin | Dwyer Airport, Afghanistan |
Destination | Mary International Airport, Turkmenistan |
Occupants | 9 |
Passengers | 0 |
Crew | 9 |
Fatalities | 7 |
Injuries | 2 |
Survivors | 2 |
On 18 May 2016, a Silk Way Airlines Antonov An-12 cargo plane crashed after an engine failure [1] during the take off run at Dwyer Airport in southern Afghanistan, en route to Mary International Airport in Turkmenistan. [2] Seven of the nine crew members on board were killed in the crash, which was the second incident for Silk Way in Afghanistan after a 2011 Il-76 crash. The two survivors, whom were Ukrainian men who worked as technicians and were not in the flights cockpit were taken to hospital and treated for their injuries. [3]
Arif Mammadov, head of Azerbaijan's State Civil Aviation Administration, said that the aircraft crashed after hitting an obstruction. [4]
Azerbaijan's Accident Investigation Commission dispatched a team to Camp Dwyer to investigate the crash. [1]
The aircraft involved in the crash registered as 4K-AZ25 was an Antonov An-12 cargo aircraft, powered by four Ivchenko AI-20M-6 turboprop engines. At the time of the incident, the aircraft was 53 years old because was constructed in 1963 and it was delivered on 19 July of the same year to Soviet Air Force and after multiple leases finally in September 2015 became property of Silk Way Airlines until the day of the crash. [5]
Also the aircraft was expected to be permanently retired from operational service and presumably scrapped in October 2016, 5 months later. [1]
The crew consisted of an Uzbekistan citizen, 3 Ukrainians and 5 Azeris. The captain was a 66 year old Uzbekistani by the name of Rashid Shaydanov with 22,628 flight hours total, 3,953 flight hours on An-12 aircraft, with his first officer being 35 years old with the name of Altay Abdullayev, with 4,625 flight hours total, 836 flight hours on An-12 aircraft, and along with them is Flight Navigator Nazim Asadullayev and Radio Operator Firdovsi Shaverdiyev. [6] [1]
This section may be too technical for most readers to understand.(September 2024) |
On 8 June 2016 the Interstate Aviation Committee (MAK) announced, that Afghanistan have delegated the accident investigation to the MAK, the MAK is now leading the investigation into the accident, Azerbaijan's Accident Investigation Commissions as well as specialists from Ukrainian aircraft manufacturer are participating in this investigation. [1] On 16 November 2016 Russia's MAK released their preliminary report reporting that First Officer Abdullayev was pilot flying, and Captain Shaydanov was pilot monitoring. While taxiing out for departure the flight engineer reported the #3 engine (inboard right hand) was showing an MGT[ clarification needed ] of above 600 and even 700 degrees,[ clarification needed ] the captain requested to be more attentive. The flaps were set to 15 degrees, CG as well as gross weight was within limits. While reading the takeoff checklist the propellers were locked, #1 and #4 propellers moved into their locked position, the #2 propeller reached the position about 17 seconds after the others, there was no evidence the #3 propeller ever locked. ATC reported the winds from 280 degrees at 14 knots gusting 26 knots and cleared the flight for takeoff.
The final report was released by the Russian Interstate Aviation Committee in October 2022, stated that the probable cause was the crew decision to conduct the takeoff with engine #3 inoperative, the propeller of which was not feathered. In course of the takeoff run, engine #3 was kept in the Ground Idle mode, therefore the propeller was producing a negative thrust which was increasing as the speed was increasing, preventing the aircraft from reaching the liftoff speed. During the takeoff run, the crew took no measures to abort the takeoff, and this resulted in the aircraft runway overrun at a speed of 220 km/h (140 mph), as well as in the aircraft destruction in the post-crash fire and in the deaths of people.
As stated above, the crew made a decision to conduct a takeoff with inoperative engine #3. Most probably, this decision had been made considering that at the Dwyer AD there were no conditions necessary for the engine overhaul or change. During the takeoff run no crew reports related to the abnormal engine #3 operation were recorded. Thus, the aircraft takeoff run was conducted with the unfeathered propeller of the inoperative engine #3 which caused a significant negative thrust development and inhibited the speed increase. This conclusion is also proved by the mathematical model made by Antonov State Company. According to Antonov State Company conclusion, the model results that more accurately meet the recorded aircraft trajectory parameters are the results of the scenario when there is no autofeathering of the engine #3 propeller as an answer to the reverse thrust alert. The engine #3 propeller turns into windmilling[ clarification needed ] with the negative thrust development which increases as the speed increases. The situation was caused by not setting the engine #3 throttle control lever to 40±2 degrees temperature mode. Moreover, according to Antonov State Company conclusion, it should be assumed that the propeller of engine #3 (inoperative engine) was not latched to the flight stop.
During the takeoff run, the unfeathered propeller created the maximum negative thrust which made the takeoff impossible. The available data do not provide the opportunity to precisely determine the reason why during the takeoff run, the crew did not increase the engine #3 rpm up to the values more than the ground idle. The most probable reason may be the increase of the turbine outlet temperature of engine #3 above the maximum allowable taxiing limit. Probably, the crew was afraid that the increase of the inoperative engine rpm may cause the recurrent increase of the turbine outlet temperature above the allowable limit.
The recorded information and the CCTV data of Dwyer AD evidence that with the elevator nose-up deflection to -14°, the aircraft did not lift off. On running along all the runway length (2,439 m; 8,002 ft), and the concrete area of 90 m (300 ft) at a speed of 220 kilometres per hour (140 mph), at 10:00:57, the aircraft ran over the runway and reached the ground. The total run before the aircraft overran the runway concrete surface lasted 70 s. During the takeoff run the crew took no measures to abort the takeoff. [1]
Thrust reversal, also called reverse thrust, is the temporary diversion of an aircraft engine's thrust for it to act against the forward travel of the aircraft, providing deceleration. Thrust reverser systems are featured on many jet aircraft to help slow down just after touch-down, reducing wear on the brakes and enabling shorter landing distances. Such devices affect the aircraft significantly and are considered important for safe operations by airlines. There have been accidents involving thrust reversal systems, including fatal ones.
The Antonov An-10 Ukraina is a four-engined turboprop passenger transport aircraft designed in the Soviet Union.
Silk Way Airlines is an Azerbaijani private cargo airline with its head office and flight operations at Heydar Aliyev International Airport in Baku. It operates freight services to Asia, the Middle East and Europe, as well as services for government and non-governmental organisations. The airline is part of the Silk Way Group.
S7 Airlines Flight 778(S7778/SBI778) was a scheduled domestic passenger flight from Moscow to Irkutsk, Russia. On 9 July 2006, at 06:44 local time, the Airbus A310-324 aircraft operating the route overran the runway during its landing in Irkutsk. The aircraft failed to stop and crashed through the airport's concrete perimeter fence, struck rows of private garages and burst into flames, killing 125 people.
Mohawk Airlines Flight 405, a Fairchild Hiller FH-227 twin-engine turboprop airliner registered N7818M, was a domestic scheduled passenger flight operated by Mohawk Airlines that crashed into a house within the city limits of Albany, New York, on March 3, 1972, on final approach to Albany County Airport, New York, killing 17 people. The intended destination airport lies in the suburban Town of Colonie, about 4 miles north of the crash site.
Spanair Flight 5022 or (JK5022/JKK5022) was a scheduled domestic passenger flight from Barcelona–El Prat Airport to Gran Canaria Airport, Spain, with a stopover in Madrid–Barajas Airport that crashed just after take-off from runway 36L at Madrid-Barajas Airport to Gran Canaria Airport at 14:24 CEST (12:24 UTC) on 20 August 2008. The aircraft was a McDonnell Douglas MD-82, registration EC-HFP. Of the 172 passengers and crew on board, 154 died and 18 survived.
Aviaarktika was a Soviet airline which started operations on 1 September 1930 and was absorbed by Aeroflot on 3 January 1960.
On April 4, 1955, a United Airlines Douglas DC-6 named Mainliner Idaho crashed shortly after taking off from Long Island MacArthur Airport, in Ronkonkoma, Islip, New York, United States.
On 5 November 2010, JS Air Flight 201, a Beechcraft 1900 passenger aircraft on a charter service from Karachi to the Bhit Shah gas field in Sindh, Pakistan, crashed near Karachi's Jinnah International Airport, after suffering an engine malfunction at take-off. All 21 people on board were killed.
Sita Air Flight 601 (ST601/STA601) was a Nepalese domestic passenger flight, operated by Sita Air from Tribhuvan International Airport in Nepal's capital Kathmandu to Tenzing-Hillary Airport in Lukla. On 28 September 2012, the Dornier 228 serving the route crashed while attempting an emergency landing at Kathmandu shortly after takeoff, killing all 19 people on board.
The minimum control speed (VMC) of a multi-engine aircraft is a V-speed that specifies the calibrated airspeed below which directional or lateral control of the aircraft can no longer be maintained, after the failure of one or more engines. The VMC only applies if at least one engine is still operative, and will depend on the stage of flight. Indeed, multiple VMCs have to be calculated for landing, air travel, and ground travel, and there are more still for aircraft with four or more engines. These are all included in the aircraft flight manual of all multi-engine aircraft. When design engineers are sizing an airplane's vertical tail and flight control surfaces, they have to take into account the effect this will have on the airplane's minimum control speeds.
Sepahan Airlines Flight 5915 was a scheduled domestic passenger flight from Iranian capital Tehran Mehrabad International Airport to Tabas, South Khorasan province, Iran. On 10 August 2014, the HESA IrAn-140 twin turboprop serving the flight crashed shortly after takeoff from Mehrabad International Airport, falling into a boulevard near the Azadi Stadium. Of the 42 passengers and six crew on board, 40 people died.
On 27 January 2001, an Antonov An-70 prototype crashed close to Omsk Tsentralny Airport, Russia during testing of the aircraft. All 33 passengers and crew on board the aircraft survived.
The Antonov An-12 is a transport aircraft designed and manufactured by the Ukrainian manufacturing and services company Antonov. Given the long operational history of the An-12, more than 190 An-12s have crashed involving many casualties. The An-12 has also been involved in a number of aviation incidents.
On 4 July 1966, an Air New Zealand Douglas DC-8-52 crashed on takeoff from Auckland International Airport on a training flight, killing 2 out of the 5 crew members on board. The crash was the first fatal accident in the history of Air New Zealand and the only accident to date of a commercial airliner in New Zealand. The investigation concluded that during the captain's attempt to simulate an engine failure, the captain accidentally deployed the thrust reverser on the number four engine. This resulted in the aircraft's speed falling below the minimum control speed, which resulted in the aircraft become uncontrollable and the eventual crash.
Aeroflot Flight A-13 was a scheduled Soviet domestic passenger flight from Baku, Azerbaijan to Fort-Shevchenko in Kazakhstan that crashed on 18 August 1973 shortly after takeoff killing 56 of the 64 passengers and crew aboard. The Antonov An-24 had suffered an engine failure on takeoff and was attempting to return to the airport when it struck an oil rig cable at low altitude resulting in a crash. At the time, it was the second deadliest accident involving the An-24 and remains the second deadliest aviation accident in Azerbaijani history. The engine failure had been caused by the effect of continuous overheating on the performance of the blades.
Aeroflot Flight L-51 was a scheduled domestic passenger flight operated by an Antonov An-24 that crashed on approach to Liepāja International Airport on 30 December 1967, resulting in the death of 43 of the 51 people on board. To date, it is the deadliest aviation accident in Latvian history. The investigation revealed the cause of the accident to be pilot error.
Angara Airlines Flight 200 was a domestic scheduled flight from Ulan-Ude Airport to Nizhneangarsk Airport, Russia. On 27 June 2019, the Antonov An-24RV aircraft operating the flight suffered an engine failure on take-off. On landing at Nizhneangarsk, the aircraft departed the runway and collided with a building. The captain and flight engineer were killed. Many of the 43 passengers sustained injuries.
Kalitta Air Flight 207 (K4207/CKS207) was a scheduled cargo flight between John F. Kennedy Airport to Bahrain International Airport with a technical stopover at Brussels. On May 25, 2008, the Boeing 747-200 suffered a bird strike and overran runway 20 during takeoff at Brussels Airport, causing the aircraft to split into three large pieces. The occupants sustained minor injuries.
Overseas National Airways (ONA) Flight 032 was a non-scheduled positioning flight operated by Overseas National Airways with a McDonnell Douglas DC-10-30CF. On November 12, 1975, the flight crew initiated a rejected takeoff after accelerating through a large flock of gulls at John F. Kennedy International Airport, resulting in a runway excursion. Of the 139 aircraft occupants, all survived, while the aircraft was destroyed by an intense post-crash fire. The National Transportation Safety Board concluded that the probable cause of the accident was bird ingestion into the right-hand engine, causing an uncontained engine failure that ruptured several landing gear tires and disabled the engine's hydraulic system, in turn partially disabling the spoilers and the landing gear brakes. Contributing to the accident was the resultant failure of the affected engine's thrust reverser and the wet runway. The accident aircraft is claimed to be the largest commercial airliner ever destroyed due to a bird strike.