Accident
Last updated: 23 August 2014
Status:Schlussbericht
Datum:Samstag 14 November 1992
Zeit:ca 07:12
Flugzeugtyp:Silhouette image of generic YK40 model; specific model in this crash may look slightly different
Jakowlew 40
Fluggesellschaft:Vietnam Airlines
Kennzeichen: VN-A449
Werknummer: 9631848
Baujahr: 1976
Betriebsstunden:4668
Anzahl Zyklen der Zelle:3686
Triebwerk: 3 Ivchenko AI-25
Besatzung:Todesopfer: 6 / Insassen: 6
Fluggäste:Todesopfer: 24 / Insassen: 25
Gesamt:Todesopfer: 30 / Insassen: 31
Sachschaden: Zerstört
Konsequenzen: Written off (damaged beyond repair)
Unfallort:nahe Son Trung (   Vietnam) show on map
Flugphase: Annäherung (APR)
Betriebsart:Inländischer planmäßiger Passagierflug
Flug von:Ho Chi Minh City-Tan Son Nhat International Airport (SGN/VVTS), Vietnam
Flug nach:Nha Trang Airport (NHA/VVNT), Vietnam
Flugnummer: 474
Unfallbericht:
The Yak-40 was approaching Nha Trang when it descended below safe altitude. Also, the aircraft deviated 6km off the W-13 airway.
The aircraft impacted the top of a ridge, struck some trees and crashed 350m further on, at a height of 970m.
Weather reported at Nha Trang was Wind 310° 1m/s 3cu at 300m, 5cu at 500m and 8sc at 1500m, temperature 25°c and QFE 758.9. Rescue workers reached the wreckage after eight days.


Informationsquelle:
» Soviet Transports
» Flight International
» Vietnam Air Accident Inquiry Organisation


Sicherheitsempfehlungen
The following safety recommendations were issued:

1 The Ministry of Defence, the Civil Aviation Administration of Vietnam should take into consideration with a view to increase the minimum obstacle clearance altitudes for routes over mountainous areas along the coast. All airports should be equipped with approach radars.


2 Aviation meteorology industry should in close collaboration with the General Directorate of Hydrometeorology pay more attention to the characteristics of the meteorological forecasts for Aviation industry, inform timely of thunderstorms, low pressure and climate changes in order to take precaution against windshears and vortex which cause violent downdraft and updraft.


3 Control towers at airports near the coast should have adequate meteorological equipment, and the controllers should improve their skills in controlling aircraft during approach.


4 Regarding Nha Trang Airport, if there appears a typhoon 250-400 km away, that typhoon should be watched and kept trace. If the typhoon is within a radius of 200 km or the airport is within the typhoon area, an alert should be initiated and the airport should be closed. Aircraft should be flown at the level of at least 2,000 metres above the highest obstacle along the route W-13 (Da Lat - Nha Trang).


5 The Government should promulgate a decision as soon as possible to form a National Committee for Search and Rescue, and there should be a decree for its operation from central to grassroots levels.

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photo of Yakovlev 40 VN-A449
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This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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Yakovlev 40

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