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On 13 July 2011, Noar Linhas Aéreas Flight 4896, a Let L-410 Turbolet passenger aircraft on a domestic service from Recife to Mossoró, Brazil, crashed shortly after take-off in the Boa Viagem neighbourhood of Recife, after suffering an engine failure. All 16 people on board were killed.[1]

Noar Linhas Aéreas Flight 4896
A Noar Linhas Aéreas L-410 similar to the one involved
Accident
Date13 July 2011 (2011-07-13)
SummaryCrashed following engine failure at take-off
SiteRecife, Brazil
8°09′09″S 34°54′34″W
Aircraft
Aircraft typeLet L-410UVP-E20
OperatorNoar Linhas Aéreas
Call signNOAR 4896
RegistrationPR-NOB
Flight originRecife Airport, Recife, Brazil
StopoverAugusto Severo International Airport, Natal, Brazil
DestinationMossoró Airport, Mossoró, Brazil
Occupants16
Passengers14
Crew2
Fatalities16
Survivors0

Accident


Crash site (2022)
Crash site (2022)

The aircraft took off from Recife Airport's runway 18 at 06:50 local time (09:50 UTC) bound for Augusto Severo International Airport, Natal and then Mossoró Airport, its final destination. Seconds after lift-off, the left engine lost power, and a minute later the crew issued a mayday call, requesting to return immediately to the airport.[2]

The Turbolet climbed to 400 ft while turning to position itself for a landing on the opposite runway 36, but it subsequently started losing altitude. At 06:54, shortly after the crew announced their intention to attempt an emergency landing on the beach, the aircraft stalled and crashed into an open area of Boa Viagem, between Visconde de Jequitinhonha and Boa Viagem Avenue, approximately 2 km (1.2 mi; 1.1 nmi) from the end of the runway. An intense post-impact fire erupted, consuming most of the wreckage.[3] Both pilots and all fourteen passengers were killed.


Aircraft


The accident aircraft was Let L-410UVP-E20 with registration PR-NOB, built in 2010 as c/n 2722.[4] It was the second purchased by Noar Linhas Aéreas, entering service in June 2010.[5]

The L-410 is powered by two M601 turboprop engines produced by Czech manufacturer Walter. The M601 is a free-turbine turboshaft, where the propeller is driven by a power turbine that is unconnected to the gas generator turbine (sometimes called compressor turbine).


Investigation


An investigation into the accident was opened by the Aeronautical Accidents Investigation and Prevention Center (Portuguese: Centro de Investigação e Prevenção de Accidentes Aeronáuticos – CENIPA).[3]

In July 2013, the CENIPA published its final report. It found that the left engine failed because a blade in the gas generator turbine had broken off shortly after the airplane lifted off the runway, causing extensive damage to the engine and loss of power. The failure was caused by metal fatigue originating underneath the surface of the blade. A fluorescent penetrant inspection carried out during maintenance six months before the accident had not revealed any abnormality.[6]

While twin-engine aircraft are normally capable of flying with one engine inoperative, the report identified several factors that prevented the Turbolet from maintaining altitude and speed, including a 130 kg (290 lb) exceedance in the maximum take-off weight resulting from an error in the software used by the flight dispatcher, the insufficient application of right rudder by the pilot flying, and the incomplete execution of the recommended emergency procedure for engine failure at take-off.[6]

The report highlighted deficiencies in Noar's training programme for the L-410 aircraft with regard to engine failures at take-off, and also discrepancies between different versions of the aircraft checklists that were available to flight crews. The CENIPA made several safety recommendations to Noar and Let to address such issues, and also to GE Aviation, the owner of engine manufacturer Walter, to "reevaluate the method utilized for the exam of the blades."[6]


References


  1. Sekine, Yukari; Grudgings, Stuart (13 July 2011). "Brazil plane crashes after take-off, 16 dead". Reuters. Retrieved 15 May 2019.
  2. "Brazil plane crash in Recife kills all 16 on board". BBC News. BBC. 13 July 2011. Retrieved 13 July 2011.
  3. Hradecky, Simon. "Crash: NOAR L410 near Recife on Jul 13th 2011, lost height". Aviation Herald. Retrieved 13 July 2011.
  4. "Accident description PR-NOB". Aviation Safety Network. Retrieved 13 July 2011.
  5. "Avião cai no Recife e deixa 16 mortos, diz Corpo de Bombeiros" [Plane crashes in Recife, killing 16, says Fire Department] (in Portuguese). Globo. Retrieved 13 July 2011.
  6. A - Nº 019/CENIPA/2013 (PDF) (Report). Aeronautical Accidents Investigation and Prevention Center. 18 July 2013. Archived (PDF) from the original on 13 May 2019. Retrieved 13 May 2019.



На других языках


[de] NOAR-Linhas-Aéreas-Flug 4896

Der NOAR-Linhas-Aéreas-Flug 4896 (Flugnummer: N0 4896) war ein Inlandsflug der brasilianischen Regionalfluggesellschaft NOAR Linhas Aéreas vom Flughafen Recife nach Mossoró mit einem Zwischenstopp auf dem Flughafen Augusto Severo in Natal. Am 13. Juli 2011 verunfallte auf diesem Flug eine Let L-410UVP-E20, wobei alle 16 Menschen an Bord ums Leben kamen.
- [en] Noar Linhas Aéreas Flight 4896

[fr] Vol Noar Linhas Aeréas 4896

Le 13 juillet 2011, un Let L-410 Turbolet de la compagnie Noar Linhas Aéreas (en) immatriculé PR-NOB s'écrase peu après son décollage de l'aéroport de Recife. Les 16 occupants de l'appareil sont décédés. Peu après le décollage, l'équipage a lancé un appel de détresse et a annoncé son intention de se poser en catastrophe sur une plage à Boa Viagem, mais il n'y est pas parvenu.

[ru] Катастрофа Let L-410 в Ресифи

Авиакатастрофа в Ресифи — авиационное происшествие (катастрофа) с самолётом Let L-410 Turbolet бразильской авиакомпании Noar Linhas Aéreas, выполнявшим 13 июля 2011 года регулярный пассажирский рейс 4896 из международного аэропорта Гуарарапис (Ресифи) в аэропорт Мосоро с промежуточной посадкой в международном аэропорту Аугусту Северу (Натал). В катастрофе погибли все 16 человек, находившиеся на борту лайнера.



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