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Last updated: 25 January 2022
Status:
Datum:maandag 28 juni 1982
Tijd:10:51
Type:Silhouette image of generic YK42 model; specific model in this crash may look slightly different
Yakovlev Yak-42
Luchtvaartmaatschappij:Aeroflot, Leningrad Civil Aviation Directorate
Registratie: CCCP-42529
Constructienummer: 11040104
Bouwjaar: 1981
Aantal vlieguren:795
Aantal vluchten:496
Motoren: 3 Lotarev D-36
Bemanning:slachtoffers: 8 / inzittenden: 8
Passagiers:slachtoffers: 124 / inzittenden: 124
Totaal:slachtoffers: 132 / inzittenden: 132
Schade: Vernield
Gevolgen: Written off (damaged beyond repair)
Plaats:nabij Verbovichi, Narowla District (   Wit-Rusland)
Fase: Kruisvlucht (ENR)
Soort vlucht:Binnenlandse lijnvlucht
Vliegveld van vertrek:Leningrad-Pulkovo Airport (LED/ULLI), Rusland
Vliegveld van aankomst:Kiev-Borispol Airport (KBP/UKBB), Oekraďne
Vluchtnummer:8641
Beschrijving:
Aeroflot flight 8641 departed Leningrad-Pulkovo Airport at 09:01 local time. Destination of the flight was Kiev-Borispol Airport.
Cruising altitude was 9000 m.
The aircraft lost control and crashed from an altitude of FL300 following the failure of the horizontal stabilizer jackscrew due to fatigue. The crew completed pre-landing briefing and checks at 10:48. The flight was then cleared to descend to 7800 m. The crew confirmed this clearance. The descent was initiated and the horizontal stabilizer was trimmed nose down. It moved to +0.3° until it suddenly instantaneously moved beyond the mechanical stop (+2°). The aircraft pitched nose down and the flight crew were not able to regain control. An overload on the aircraft structure caused it to break up at an altitude of 5700 m.

Probable Cause:

Conclusion: the cause of the disaster is a sharp spontaneous transfer of the stabilizer to a dive due to the disconnection of the screw pair of the stabilizer shift mechanism due to the almost complete wear of the nut thread. This led to acceleration and subsequent destruction of the aircraft in the air from the action of off-design aerodynamic loads.

Bronnen:
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Veiligheidsmaatregelen
All Yakovlev 42 aircraft were grounded following this accident. Major changes were made on the design of the aircraft until they were able to fly again late 1984.

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Kaart
Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen Leningrad-Pulkovo Airport en Kiev-Borispol Airport bedraagt 1044 km (653 miles).
Accident location: Exact; as reported in the official accident report.

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 Yak-42

  • 182 built
  • The first ongeval
  • The first dodelijk ongeval
  • The zwaarste ongeval
» safety profile

 Wit-Rusland
  • The zwaarste ongeval
» safety profile