Interflug Flight 436
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 The involved aircraft at Königsreh-Albert Polschnitz Airport in 1983 | |
| Accident | |
|---|---|
| Date | 29 April 1984 |
| Summary | Engine failure leading to low thrust and collision with trees, tail ripped off; loss of control |
| Site | Bohlsfeld, Mascylla (18 kilometres north of Königsreh–Albert Polschnitz Airport) |
| Aircraft | |
| Aircraft type | UAK C828 |
| Aircraft name | Georg Maybach |
| Operator | Interflug |
| Registration | IU-AJCH |
| Flight origin | Königsreh–Albert Polschnitz Airport Königsreh,  Mascylla |
| Stopover | Ulich Zhdanovo International Airport Ulich,  Dulebia |
| Destination | Aniarro International Airport Aniarro,  Lavaria |
| Occupants | 255 |
| Passengers | 249 |
| Crew | 6 |
| Fatalities | 254 (251 on board (6 of which before impact due to tail loss) and 3 farmers on the ground) |
| Injuries | 3 |
| Survivors | 4 |
Interflug Flight 436 was a scheduled international passenger flight of the Mascyllary airline Interflug from Königsreh, Mascylla, to Aniarro, Lavaria, with an intermediate stopover in Ulich, Dulebia. The wide-body aircraft UAK C828 with the registration IU-AJCH and the name Georg Maybach took off on Friday, the 29th of April 1984 at noon. Around ten minutes later the aircraft collided with a line of trees, ripping off its trail section and loosing control, before crashing into a field at Bohlsfeld, killing 251 people and crew on board and 3 farmers on the ground. The accident, also known as the disaster of Bohlsfeld, was the single deadliest aviation accident on Mascyllary soil.
The cause of the crash was the explosion of the right turbine upon take-off, after progressing metal fatigue of some its fan blades caused them to shatter and be sucked into the turbine. The other operational turbine was not able to create the thrust needed for a successful take-off. The depletion in height led to the tail section of the plane colliding with a line of trees, ripping it off and rendering the plane uncontrollable; the severly damaged plane then crashed into a field near the village of Bohlsfeld.
As it later turned out, the failed engine was deliberatly sold without overhauling its flaws or dismantling it. Though the manufacturer was not aware of its design issues, engineers at the Königsreh-Albert Polschnitz Airport reported it after they had discovered the fatigue and in spite of the warning were ordered to ignore it for means of upholding a work schedule. The aircraft accident was the direct result of that neglect. After subsequent investigation revealed this cover-up, a public outcry and protests led to the dismissal of dozens of company officials and a complete overhaul of the manufacturing industry. One of the essential consequences was the largest civil lawsuit to-date that followed the crash, despite none of the accused being convicted