Investigation Summary
Flight 451 was an international multi-leg service from Rome to New York. On the night of the accident, the flight had skipped its scheduled stop in Milan due to heavy fog, arriving at Paris-Orly an hour ahead of schedule. After a routine stopover, the aircraft departed Runway 26 at 00:35 local time on 24 November (which corresponded to 23:35 on 23 November UTC; some records like the ICAO digest note 23:18 UTC). Within 15 seconds of liftoff, the aircraft began losing altitude for reasons that investigators could not identify. The pilot reportedly radioed that he was unable to gain height and intended to return to the airport, but the aircraft struck the roof of a house in Paray-Vieille-Poste, approximately 600 meters past the end of the runway. The impact with the houses and an electricity cable triggered a massive explosion, fueled by 23,000 liters of gasoline. The wreckage was scattered over 500 meters, with the four engines thrown in different directions. Among the victims was the renowned Italian conductor Guido Cantelli. This 1956 accident is distinct from the 1954 crash of LAI Flight 451 at Idlewild Airport.
Final Conclusions
The official investigation concluded that the primary cause was a slight loss of altitude shortly after takeoff, for which no explanation could be found. Investigators ruled out mechanical failure, crew fatigue, or lack of qualification. While a thin film of frost was noted on the wings by ground staff prior to departure, the commission deemed it improbable that this affected the flight's performance. The presence of unmarked obstructions in the takeoff path was noted as a significant aggravating factor that contributed to the collision once the altitude loss occurred, but the 'initial and direct cause' remains officially unknown.
Video Analysis
No video analysis linked for this case file yet.
Airframe & Maintenance
Crew Experience
Captain
Attilio Vazzoler, age 41, described as one of the company's most experienced pilots.
Systems & Failure Modes
Wing Surfaces
Ground staff reported a film of frost on the upper wing extremities, though investigators doubted this caused the crash.
Pratt & Whitney R-2800 Engines
Post-crash analysis found no evidence of mechanical failure or power loss in the four radial engines.
Interesting Facts
- 01The aircraft was brand new, having entered service only 19 days prior on November 5, 1956.
- 02Guido Cantelli, the newly appointed musical director of La Scala, was among those killed.
- 03There were initially two survivors, Niccodemo and Concetta Finamore; Concetta became the sole survivor after her husband succumbed to his injuries.
- 04The aircraft was carrying 23,000 liters of fuel at the time of the crash, leading to a massive post-impact fire.
- 05The investigation found that all four engines were functioning and were flung in different directions upon impact.
Safety Actions & Advisories
Obstruction Marking
The investigation highlighted that unmarked obstructions in the takeoff path at Orly acted as an aggravating factor, leading to calls for better marking of structures near runway ends.