Investigation Summary
The accident was driven by a combination of outdated weather information and rigid aircraft system logic. The crew was informed of wind shear and attempted a high-speed landing with a slight bank to compensate for a reported crosswind. However, the crosswind had shifted into a 20-knot tailwind, causing the aircraft to land at 170 knots, significantly faster than normal. Because the pilots banked the aircraft, the right main gear touched down first, but the left gear remained uncompressed for nine seconds. The Airbus A320's flight control software required a compression load of at least 6.3 tons on both main landing gear struts, or wheel rotation speeds above 72 knots, to enable ground spoilers and thrust reversers. Due to hydroplaning on the water-covered runway, the wheels did not spin up, and the lack of dual-strut compression meant the most effective braking systems remained locked until the aircraft was already 1,525 meters past the threshold. By the time full braking was achieved, only a small portion of the runway remained. The resulting impact and fire killed two people and injured 56 others, 51 of them seriously.
Final Conclusions
The Main Commission for Aircraft Accident Investigation (MCAAI) concluded that the primary cause was the incorrect decisions and actions of the flight crew, who failed to account for the actual wind conditions and landed too far down the runway. Contributing factors included the lack of up-to-date wind information from the tower and the design features of the A320's logic systems, which prevented the crew from manually overriding the braking inhibitions during the critical seconds after touchdown.
Photographic Evidence (1)
Video Analysis
The worst Lufthansa Crash in HISTORY! (LH2904 Comprehensive Breakdown) — A detailed breakdown of the 1993 Warsaw runway overrun, exploring how tailwinds, hydroplaning, and Airbus system logic led to a fatal crash.
If playback is blocked, the owner has disabled embedding — use the link above.
Airframe & Maintenance
Systems & Failure Modes
Ground Spoilers / Thrust Reversers Logic
Software logic required 6.3 tons of pressure on each main gear strut to confirm the aircraft was on the ground before allowing deployment.
Wheel Braking System
Automatic wheel brakes were programmed to activate only when wheel rotation speed reached at least 72 knots.
Oleo Struts
Shock absorbers on the landing gear that serve as the primary sensor for the aircraft's 'ground' mode via compression.
Interesting Facts
- 01The aircraft was only three years old at the time of the accident.
- 02The aircraft, D-AIPN, was named 'Kulmbach'.
- 03The A320's braking systems were inhibited because the computer did not receive a 'weight-on-wheels' signal from both struts simultaneously.
- 04Hydroplaning prevented the wheels from reaching the 72-knot rotation speed required to bypass the strut compression logic.
- 05The training captain in the right seat died on impact; one passenger died from smoke inhalation after losing consciousness.
Safety Actions & Advisories
Logic Software Update
Airbus modified the landing gear logic to allow spoiler activation if only one strut is compressed or if the radio altimeter shows the aircraft is on the ground.
Braking System Thresholds
The pressure threshold required for strut compression sensors to trigger 'ground' mode was reduced to allow faster activation of braking systems.