ČSA Flight 001
Czechoslovak Airlines Flight 001 was an Ilyushin Il-18B four engine turboprop airliner, registered OK-NAB, which was operating as a scheduled domestic passenger flight from Prague's Ruzyně airport to Bratislava-Ivanka Airport, both in Czechoslovakia, which crashed into the Zlaté Piesky Lake while attempting to land in Bratislava on July 28, 1976. All 6 crew members and 70 out of 73 passengers died.
Crash
The flight departed Prague airport at 8:52 and proceeded routinely to Bratislava. At 9:35:10 the flight was cleared by Bratislava tower to land on runway 22. For reasons that are unclear, the crew executed a highly unstabilized ILS instrument approach to runway 22, with rates of descent as high as 4,320 fpm or instead of ; speeds varying from instead of ; and flap selection directly from 0 degree to full flaps instead of in gradual increments. As they approached the runway, the crew inadvertently set thrust reversal at the no. 2 and no. 3 engine while still airborne. The thrust reversal caused the no. 3 engine to fail and the crew then inadvertently feathered the no. 4 prop, losing all thrust on the right side of the aircraft. At above the runway threshold the crew attempted to execute a go-around. They tried to restart the no. 4 engine at, but the ensuing right bank due to asymmetric thrust increased; the aircraft then lost control and struck lake Zlaté Piesky in a 60 degree right bank and a 60 degree nose down attitude.Communications log
; 09:36:20; 09:36:30
; 09:36:50
; ''09:37:10''
Investigation
The investigators published the causes as follows:- Use of thrust reversal at altitude under.
- Improper manipulation of the thrust levers of the inner engines.
- Reducing speed under the allowed limit on final approach.
- Erroneous feathering of the engine number 4 propeller.
- Failure to bank the plane towards the working engines side.
- The immediate cause was the attempt to start engine number 4 at low speed and altitude.