Investigation Summary
The flight was a private charter organized for fans returning from the Five Nations Championship match between Wales and Ireland. The aircraft, named 'Star Girl', was a veteran of the Berlin Airlift. To maximize profit, the operator had stripped the interior and bolted in additional seats to accommodate 78 passengers, six more than the original high-capacity configuration. During the return leg from Dublin, the aircraft was loaded in a manner that placed the center of gravity outside the aft limits specified in the Certificate of Airworthiness. As the aircraft approached Runway 28 at Llandow, it was observed to be abnormally low. When the pilot applied full throttle to compensate, the tail-heavy condition caused the nose to pitch up to an extreme 35-degree angle. The aircraft reached approximately 300 feet before the wing stalled. It struck the ground right-wing first, followed by the nose, and disintegrated without fire. While 11 people initially survived the impact, eight later died in the hospital from their injuries, leaving only three long-term survivors: two passengers in the newly installed rear seats and one man who had been in the lavatory.
Final Conclusions
The official investigation concluded the primary cause was the improper loading of the aircraft. The center of gravity was located too far aft, exceeding the safety limits. This created acute longitudinal instability and left the pilot with insufficient elevator authority to prevent a stall when power was increased during the low approach. The unauthorized or poorly calculated seating modifications were central to the imbalance.
Video Analysis
Llandow Air Disaster Fatal Accident - 80 fatalities - Avro 689 — A detailed look at the March 12, 1950, crash of an Avro 689 Tudor V near Llandow Aerodrome, which at the time was the deadliest air disaster in history.
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Airframe & Maintenance
Systems & Failure Modes
Elevators
The control surfaces used to manage pitch; they were unable to overcome the nose-up moment caused by the aft center of gravity.
Weight and Balance
The critical calculation of the aircraft's center of gravity, which was found to be outside the aft limit due to improper passenger and baggage distribution.
Interesting Facts
- 01At the time of the accident, it was the deadliest air disaster in history.
- 02The aircraft had been modified to include extra seats bolted into the rear of the fuselage.
- 03Three passengers survived the crash: two sitting in the rear-most seats and one who was in the lavatory.
- 04The flight was chartered for fans attending the Wales vs. Ireland match at Ravenhill Stadium in Belfast; the fans traveled to Dublin by road for the return flight.
- 05There was no post-impact fire or explosion, which likely contributed to the survival of the three individuals.
Safety Actions & Advisories
Loading and Center of Gravity Oversight
The accident highlighted the dangers of unauthorized cabin modifications and the critical necessity of accurate weight and balance manifests for charter operations.