23 fatalities

2005-12-23: Antonov AN-140 (4K-AZ48) — Azerbaijan Airlines - AZAL Airlines — Nardaran, Azerbaijan

Nardaran, AzerbaijanTakeoff (climb)

On December 23, 2005, an Antonov AN-140 (registration 4K-AZ48) operated by Azerbaijan Airlines - AZAL Airlines was involved in an aviation accident near Nardaran, Azerbaijan during takeoff. 23 people were killed. Investigators recorded the probable cause as: The gyro horizons failed after takeoff due to a malfunction caused by counterfeit assemblies and instruments installed by KhGAPP during aircraft production. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 3 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 1781199156Data APIEditorial standards
Aircraft registered 4K-AZ48
Aircraft registered 4K-AZ48. Photo: John Bilterstoke / CC BY 4.0, via Wikimedia Commons

On a night flight from Baku to Aktau in difficult weather, the aircraft crashed into the Caspian Sea near Nardaran less than five minutes after takeoff, killing all 23 people on board. The gyro horizons were caged at takeoff, leading to loss of spatial orientation.

Accident

A flight from Baku to Aktau crashed into the Caspian Sea near Nardaran, approximately 35 km northeast of Baku, less than five minutes after departure. The aircraft departed at night under difficult weather conditions with caged gyro horizons. The crew lost spatial orientation, and the aircraft entered a steep right downward spiral, impacting the sea. All 5 crew members and 18 passengers were killed. Among the passengers were 15 Azerbaijanis, one Briton, one Australian, one Turkish, one Georgian, and four Kazakhs.

Investigation

Investigators found that the gyro horizons failed after takeoff due to a malfunction, which was caused by counterfeit assemblies and instruments that had been installed by KhGAPP during the production of the aircraft.

Probable Cause

The official probable cause states that the gyro horizons failed due to the installation of counterfeit components by KhGAPP. This failure led to the crew losing situational awareness and suffering spatial disorientation, resulting in an uncontrolled descent and crash into the sea. The lack of visual references at night was considered a contributing factor.