ČSA Flight 001

Czechoslovak Airlines

Industry	Airline
Headquarters	Prague , Czechoslovakia
Products	Air transport services

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Czechoslovak Airlines Flight 001 was a scheduled domestic service operated by an Ilyushin Il-18B four-engine turboprop aircraft, registered as OK-NAB. The flight was en route from Prague's Ruzyně to Bratislava-Ivanka Airport, both located within Czechoslovakia. On July 28, 1976, during its approach to Bratislava, the airplane crashed into Lake Zlaté Piesky (Golden Sands). Out of the 79 people on board, including six crew members and seventy-three passengers, only three passengers survived; all crew members and seventy passengers perished.

Crash

The aircraft departed from Prague airport at 8:52 (CEST) and proceeded without incident towards Bratislava. At 9:35:10 (CEST), air traffic control at Bratislava cleared the flight to land on runway 22. However, the crew conducted an unstable ILS approach to runway 22 for reasons that remain unclear. The descent rate reached as high as 4,320 feet per minute (approximately 22 metres per second (72 ft/s)), significantly exceeding the standard rate of 10 metres per second (33 ft/s). Airspeed fluctuated between 225 and 435 km/h rather than maintaining the expected 269 km/h. Additionally, the flaps were deployed abruptly from zero directly to full extension instead of incrementally adjusting them.

While nearing the runway, the pilots mistakenly engaged thrust reversers on the inboard engines—numbers two and three—while still airborne. This action resulted in failure of the number three engine. Subsequently, they unintentionally feathered the number four propeller, causing a total loss of power on the right side of the aircraft. At approximately 50 metres (160 ft) above the runway threshold, the crew initiated a go-around maneuver. They attempted to restart engine number four at around 40 metres (130 ft), but asymmetric thrust caused an increasing right bank. The airplane became uncontrollable and ultimately impacted Lake Zlaté Piesky in a steep right bank of roughly 60 degrees combined with a nose-down attitude of approximately 60 degrees.

Communications log

(001 - ČSA Flight 001, TWR – Bratislava air traffic control)

09:36:20

TWR: 001, executing go-around?

001: Affirmative

TWR: Roger, initiate left turn

09:36:30

001: Copy that

09:36:50

TWR: Left turn confirmed, 001!

001: …… (no response)

09:37:10

001: Ono to byla štyrka ano... / It was no. 4 yes... / (transmitted inadvertently)

Investigation

The investigative team identified the following factors as contributing to the accident:

• Activation of thrust reversers at an altitude below 1,000 m (3,300 ft).
• Incorrect handling of the inner engines' thrust levers.
• Deceleration below the minimum permitted speed during final approach.
• Mistaken feathering of the propeller on engine number 4.
• Failure to bank the aircraft toward the side with functioning engines.
• The immediate trigger was attempting to restart engine number 4 while at low speed and altitude.

Rescue operation

Following the crash into a lake within a densely inhabited area, emergency response efforts commenced promptly. Divers from Svazarm attempted rescue operations; however, most passengers either drowned or succumbed to impact injuries. Initially, four individuals were rescued alive, though one later passed away in hospital.

Controversy

A survivor later alleged in an interview that the flight captain sought permission for an emergency landing in Brno, which was denied due to the presence of a Vietnamese delegation whose visit would be negatively impacted by such an event. The passenger also stated that Vienna airport offered clearance for an emergency landing, but this was refused by communist officials. It remains uncertain how a surviving passenger could possess knowledge of the captain’s decisions during flight or how attempts to secure alternative emergency landing sites relate to the unstabilized approach and inadvertent thrust reverser deployment at Bratislava.

See also

• List of accidents and incidents involving commercial aircraft
• TABSO Flight 101 – Crash of Ilyushin Il-18B near Bratislava in 1966

External links

• Detailed information on the crash
• Aerial view of Bratislava airport and accident location on Google Maps