Investigation Summary
The accident highlighted a phenomenon known as 'cold-soaked fuel icing.' The Fokker 100 had arrived from Frankfurt with cold fuel in its tanks. During the turnaround in Skopje, light snow fell in temperatures near 0°C. While the fuel in the inboard tanks was slightly warmed by the addition of new fuel, the outboard MT3 tanks remained cold-soaked. This caused moisture to freeze into a thin, transparent layer of ice on the upper wing surfaces. The crew and the Flying Station Engineer (FSE) performed a walk-around but concluded that the wings were merely wet. Because the Fokker 100 lacks leading-edge slats, its wing is extremely sensitive to even minute amounts of surface roughness, which can cause a premature stall and loss of roll control during rotation.
Final Conclusions
The primary cause was the loss of roll controllability due to wing icing. The flight crew and maintenance personnel lacked 'ice awareness' and failed to request de-icing despite meteorological conditions conducive to icing. The investigation also noted that the multi-source operational environment, involving Dutch, Macedonian, and Swiss personnel, contributed to a lack of common procedures and oversight regarding ground icing risks.
Photographic Evidence (1)
Video Analysis
Crashing Immediately After Take-Off (Palair Macedonian Airlines Flight 301) - DISASTER BREAKDOWN — An analysis of how a modern Fokker 100 crashed moments after leaving the runway due to invisible ice contamination and the crew's decision to skip de-icing.
If playback is blocked, the owner has disabled embedding — use the link above.
Airframe & Maintenance
Crew Experience
Captain
AFT Director Flight Operations; acting as PNF and Instructor.
First Officer
Macedonian Captain-under-training; acting as PF.
Systems & Failure Modes
Wing Leading Edges
The Fokker 100 uses a 'hard' wing without slats; ice contamination here drastically reduces the critical angle of attack.
Fuel Tank Configuration
The outboard MT3 tanks remained cold-soaked, facilitating the formation of clear ice on the upper wing skin.
GPWS
The Ground Proximity Warning System issued 'sink rate' alerts in the final seconds before impact.
Interesting Facts
- 01The aircraft was nearly new, having been delivered only two months prior in January 1993.
- 02A Yak-42 on the same apron was being de-iced while Flight 301 was taxiing, but the Palair crew did not discuss the weather.
- 03The Fokker 100 wing design is particularly vulnerable to icing because it lacks leading-edge slats.
- 04The outboard MT3 fuel tanks were not full, preventing the upper wing skin from making contact with the slightly warmer fuel mixture.
- 05The aircraft struck a transformer station building shortly after the initial wingtip impact, which contributed to the fuselage breaking into three main sections.
- 0614 people survived the crash.
Safety Actions & Advisories
Fokker 100 Icing Awareness
Fokker issued revised manuals and training materials emphasizing the extreme sensitivity of the Fokker 100 wing to even small amounts of ice.
Hands-on Wing Inspection
Procedures were reinforced requiring a physical 'hands-on' check of the wing upper surface when cold-soaked fuel icing is suspected.