Nigeria Airways Flight 2120

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Nigeria Airways Flight 2120
Nationair DC-8-61 C-GMXQ FAO 1989.png
C-GMXQ, the aircraft involved, photographed in 1989
Accident
Date11 July 1991
SummaryUnder-inflated tire overheating, leading to an in-flight fire
Site King Abdulaziz International Airport, Jeddah, Saudi Arabia
21°38′13″N39°10′23″E / 21.63694°N 39.17306°E / 21.63694; 39.17306
Aircraft
Aircraft type Douglas DC-8-61
Operator Nationair Canada on behalf of Nigeria Airways
IATA flight No.WT2120
ICAO flight No.NGA2120
Call signNIGERIAN 2120
Registration C-GMXQ
Flight originKing Abdulaziz International Airport, Jeddah, Saudi Arabia
Destination Sadiq Abubakar III International Airport, Sokoto, Nigeria
Occupants261
Passengers247
Crew14
Fatalities261
Survivors0

Nigeria Airways Flight 2120 was a chartered passenger flight from Jeddah, Saudi Arabia, to Sokoto, Nigeria, on 11 July 1991, which caught fire shortly after takeoff from King Abdulaziz International Airport and crashed while attempting to return for an emergency landing, killing all 247 passengers and 14 crew members on board. [1] [2] The investigation traced the fire to underinflated tires which overheated and burst during takeoff, and subsequently discovered that a project manager had prevented those tires from being replaced because the aircraft was behind schedule. The aircraft was a Douglas DC-8 operated by Nationair Canada for Nigeria Airways. Flight 2120 is the deadliest accident involving a DC-8 and the deadliest aviation disaster involving a Canadian airline. [3]

Contents

Aircraft and crew

The aircraft involved in the accident was a Douglas DC-8-61, C-GMXQ, owned by the Canadian company Nolisair, usually operated by Nationair Canada. The aircraft was manufactured in 1968. At the time of the accident, it was being wet-leased to Nigeria Airways, which had in turn subleased it to Holdtrade Services to transport Nigerian pilgrims to and from Mecca. [4]

William Allan, the 47-year-old captain, a former Royal Canadian Air Force pilot, had logged 10,700 flight hours and 1,000 hours in type. Kent Davidge, the 36-year-old first officer, had logged 8,000 flight hours, of which 550 hours were in type. Victor Fehr, the 46-year-old flight engineer, had logged 7,500 flight hours, of which 1,000 hours were in type. [3] [5] [6]

Accident

The aircraft took off from King Abdulaziz International Airport bound for Sadiq Abubakar III International Airport in Sokoto, but problems were reported shortly thereafter. [4] [7] Unknown to the crew, the aircraft had caught fire during departure, and though the fire was not obvious, since it started in an area without fire warning systems, the effects were numerous. Pressurization failed quickly, and the crew was deluged with nonsensical warnings caused by fire-related circuit failures. In response to the pressurization failure, Allan decided to remain at 2,000 ft (610 m), but the flight was cleared to 3,000 ft (910 m) as a result of the controller mistaking Flight 2120 for a Saudia flight that was also reporting pressurization problems. This mix-up, a result of Captain Allan mistakenly identifying as "Nationair 2120" rather than "Nigerian 2120," lasted for three minutes, [5] but was ultimately found not to have had any effect on the outcome. [3]

Amidst this, First Officer Davidge, who had been flying C-GMXQ out, reported that he was losing hydraulics, prompting the crew to request a return to the airport for an emergency landing. [3] The flight crew only became aware of the fire when in-flight director Kay Smith rushed into the cockpit reporting "smoke in the back ... real bad". Allan informed Smith of the situation on the flight crew's end and, in reply to something not intelligible on the tape, told her "Yeah, just tell [the passengers] we'll be returning to, ah, Jeddah." [7] [5] [3] Shortly afterwards, Davidge reported that he had lost ailerons, forcing Allan to take control; as Allan took over, the cockpit voice recorder failed. [5] At this moment, the air traffic controller realized that Flight 2120 was not following the flight plan and contacted it to tell the crew to return to the plan, only for Allan to respond that he was unable to climb due to flight control problems. Realizing his mistake and that Flight 2120 was in trouble, the controller began directing it towards the runway. Allan subsequently contacted air traffic control multiple times, declaring an emergency, reporting flight control difficulties, and telling the controller the plane was on fire. [5]

As there were no survivors, conditions in the cabin are not precisely known, but they can be extrapolated. Smith's report makes it clear that the passengers were exposed to heavy smoke, and burn injuries along with internally melted overwing emergency exits make it clear that flames entered the cabin. [7] [3] When the aircraft was about 18 km (11 mi; 10 nmi) from the airport and at an altitude of 670 m (2,200 ft), a point where the landing gear could conceivably have been lowered, it began to experience an inflight breakup and the bodies of a number of people on board fell from it, indicating that the fire by that time had consumed, at least partially, the cabin floor. [5] Unlocked doors found in the wreckage suggest that passengers attempted to open the doors in flight, something which would have been impossible due to the speed of the aircraft. [7] [3] As the plane came in to land, Allan communicated to the tower, "Require emergency vehicles immediately, we have a fire. We will be ground evacuating." In his last communication with the tower, he reported that the plane had ended up lining up with the center runway rather than the left, prompting the controller to authorize the use of any runway. [7] [3] Just 2.875 km (1.8 mi) short of the runway, the melting aircraft finally became uncontrollable and crashed, [5] killing all 261 on board—including 247 passengers—who had not already suffocated or fallen out of the aircraft. [4] [7] [8] Nine of the 14 crew were identified, but "no attempt was made to identify the passengers". [5]

As of January 2024, the accident remains the deadliest crash involving a Douglas DC-8, [9] as well as the second-deadliest accident taking place on Saudi Arabian soil, [10] after Saudia Flight 163. [11]

Cause

Prior to departure, the lead mechanic had noticed that the "No. 2 and No. 4 tyre pressures were below the minimum for flight dispatch", [7] and attempted to inflate them, but no nitrogen gas was readily available. The project manager, unwilling to accept a delay, disregarded the problem and readied the aircraft for dispatch. [5] As the aircraft was taxiing, the transfer of the load from the underinflated No. 2 tire to the No. 1 tire on the same portside axle resulted "in overdeflection, overheating, and structural weakening of the No. 1 tire". [7] "The No. 1 tire failed very early on the take-off roll," followed almost immediately by the No. 2. [7] The latter stopped rotating "for reasons not established", and the subsequent friction of the wheel assembly with the runway generated sufficient heat to start a self-sustaining fire. [7] Given the catastrophic consequences of taking off with the landing gear in this condition, the plane was deemed after the fact to have been unairworthy. [7]

The crew realised they had a problem, but not the nature or seriousness of it. The aircraft was not equipped with fire or heat sensors in the wheel assembly. The first officer was recorded remarking, "We got a flat tire, you figure?" [5] According to Transportation Safety Board of Canada members interviewed for an episode of Mayday about the accident, standard procedures regarding tire failure during the takeoff roll on the DC-8 did not include rejecting take-off for tire or wheel failures, [3] so the captain proceeded with the take-off.

Due to common jet aircraft design, the accident became inevitable the moment the landing gear was retracted, mere seconds after takeoff and long before an emergency became apparent. [3] When this occurred, "burning rubber was brought into close proximity with hydraulic and electrical system components," causing the failure of both hydraulic and pressurisation systems that led to structural damage and loss of control of the aircraft. [12] [5] The Transportation Safety Board later concluded, "had the crew left the landing gear extended, the accident might have been averted." [5] Fuel, "probably introduced as a result of 'burn through' of the centre fuel tank", [7] intensified the fire, which eventually consumed the cabin floor. People began falling out of the aircraft when their seat harnesses burned through. "Despite the considerable destruction to the airframe, the aircraft appeared to have been controllable until just before the crash." [5]

The investigation discovered that the mechanics had known about the underinflated tires since 7 July, but that the project manager, lacking the relevant training to make an informed decision, had prevented maintenance on the tires because the aircraft was behind schedule, requiring them to record false pressure readings in the log to make the aircraft seem airworthy. This meant that Nationair Canada executives had pressured the colleagues of the cockpit crew to withhold information that had serious safety implications. [3]

Aftermath

Soon after the accident, a group of Toronto-based Nationair Canada flight attendants pooled funds to create a memorial plaque, inscribed with the names of the victims. The memorial, complete with a cherry tree planted to commemorate their colleagues who died in Jeddah, was given a permanent home at the head office of the Greater Toronto Airports Authority. [13]

The air crash, combined with Nationair Canada's poor reputation for on-time service and mechanical problems, led to serious problems with public image and reliability among tour operators. These difficulties were compounded when Nationair Canada locked out its unionised flight attendants and proceeded to replace them with strikebreakers on 19 November 1991. The lock-out lasted 15 months, and by the time it ended in early 1993, Nationair Canada found itself in severe financial trouble. At the time, Nationair Canada owed the Canadian government millions of dollars in unpaid landing fees. Creditors began seizing aircraft and demanded cash up front for services. The company was declared bankrupt in May 1993, owing CDN$75 million. [14]

In 1997, Robert Obadia, owner of Nationair Canada and its parent company Nolisair, pleaded guilty to eight counts of fraud in relation to the company's activities. [15]

An episode of Mayday in 2012, titled "Under Pressure", covered the accident. [3]

See also

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References

  1. ↑ "261 feared dead in Saudi plane crash". Reading Eagle. (Pennsylvania). Associated Press. 11 July 1991. p. 1. Archived from the original on 23 November 2021. Retrieved 11 February 2021.
  2. ↑ "Fire in landing gear preceded DC-8 crash". Eugene Register-Guard. (Oregon). Associated Press. 12 July 1991. p. 3A. Archived from the original on 2 December 2021. Retrieved 11 February 2021.
  3. 1 2 3 4 5 6 7 8 9 10 11 12 "Under Pressure". Mayday (Air Crash Investigation) (television program). Cineflex, National Geographic Channel.
  4. 1 2 3 "Headlines – Confusion over Saudi DC-8 crash". Flight International . 140 (4276): 4. 17–23 July 1991. ISSN   0015-3710. Archived from the original on 13 January 2015. Retrieved 15 June 2012.
  5. 1 2 3 4 5 6 7 8 9 10 11 12 13 "Tire Failure on Takeoff Sets Stage for Fatal Inflight Fire and Crash" (PDF). Flight Safety Foundation. September 1993. Archived from the original (PDF) on 12 July 2018.
  6. ↑ "Nationair Crash Memorial Page". Nationair Canada History on the Web. 27 January 2013. Archived from the original on 10 October 2014. Retrieved 27 June 2013.
  7. 1 2 3 4 5 6 7 8 9 10 11 12 Accident description at the Aviation Safety Network. Retrieved on 11 April 2013.
  8. ↑ "Catastrophe aérienne de Djeddah: 261 morts" [Jeddah air crash: 261 dead]. Le Monde (in French). 13 July 1991. Archived from the original on 29 June 2011. Retrieved 15 June 2012.
  9. ↑ "Accident record for the Douglas DC-8". Aviation Safety Network. Flight Safety Foundation. Archived from the original on 13 April 2014. Retrieved 30 July 2017.
  10. ↑ "Aviation accidents record for Saudi Arabia". Aviation Safety Network. Flight Safety Foundation. Archived from the original on 18 June 2018. Retrieved 30 July 2017.
  11. ↑ Accident descriptionfor HZ-AHK at the Aviation Safety Network . Retrieved on 24 June 2012.
  12. ↑ "Airline safety review – Fatal accidents: Non-scheduled passenger flights" (PDF). Flight International : 22. 29 January – 4 February 1992. Archived from the original on 5 November 2012. Retrieved 15 June 2012.
  13. ↑ "Anniversary of Nationair plane crash passes quietly". CTV News. The Canadian Press. 10 July 2011. Archived from the original on 29 October 2013. Retrieved 11 September 2014.
  14. ↑ "Nationair plie bagages" [Nationair packs luggage] (in French). CBC Digital Archives. 12 May 1993. Archived from the original on 19 March 2014. Retrieved 15 August 2013.
  15. ↑ "Robert Obadia doit verser 234 000 $ à ses créanciers" [Robert Obadia must pay $234,000 to his creditors]. Radio-Canada Nouvelles (in French). 21 August 1998. Archived from the original on 24 December 2013. Retrieved 15 August 2013.
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