Crash-aerien 01 SEP 1961 d'un Lockheed L-049 Constellation N86511 - Chicago-Midway Airport, IL (MDW)
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Statuts:Accident investigation report completed and information captured
Date:vendredi 1 septembre 1961
Heure:02:05
Type/Sous-type:Silhouette image of generic CONI model; specific model in this crash may look slightly different
Lockheed L-049 Constellation
Compagnie:Trans World Airlines - TWA
Immatriculation: N86511
Numéro de série: 2035
Année de Fabrication: 1945
Heures de vol:43112
Equipage:victimes: 5 / à bord: 5
Passagers:victimes: 73 / à bord: 73
Total:victimes: 78 / à bord: 78
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:14,5 km (9.1 milles) W of Chicago-Midway Airport, IL (MDW) (   Etats-Unis d'Amérique)
Phase de vol: En vol (ENR)
Nature:Transport de Passagers Nat.
Aéroport de départ:Chicago-Midway Airport, IL (MDW/KMDW), Etats-Unis d'Amérique
Aéroport de destination:Las Vegas-McCarran International Airport, NV (LAS/KLAS), Etats-Unis d'Amérique
Numéro de vol:TW529
Détails:
Lockheed Constellation "Star of Dublin" operated as TWA Flight 529 from Boston, MA (BOS) to San Francisco, CA (SFO) with en route stops at New York, NY, Pittsburgh, PA, Chicago, IL (MDW), Las Vegas, NV (LAS) and Los Angeles, CA (LAX).
The flight to Chicago was routine and the airplane arrived at Midway Airport at 01:18.
Following a crew change and refueling, the aircraft departed the passenger loading gate. During engine runup, Flight 529 was given its air traffic control clearance which was: "cleared to the Las Vegas Airport via Victor 6 Naperville, Victor 8 flight plan route, maintain 5,000 feet. " The clearance was acknowledged and TWA Flight 529 departed on runway 22L at 02:00, making a right turn out of traffic.
Radar contact was. established with the flight one minute and 34 seconds after the flight acknowledged takeoff clearance, and as the aircraft proceeded outbound in a right turn. At 02:04, Flight 529 was observed on radar by the departure controller to be five miles west of Midway Airport proceeding on course.
During the climbout from Midway Airport, a bolt worked its way clear in the elevator boost system. This was followed immediately by full pressure to the up-elevator side of the actuator piston. The airplane pitched up violently and an it entered an accelerated stall. The pilot's immediate response to apply high forward pressure on the control column prevented successful shift of the elevator boost system to the manual position. The pilot lost control of the airplane. Oscillatory loads then caused the separation of a of the horizontal stabilizer to which the right vertical fin is attached.
TWA Flight 529 crashed in an open field near Hinsdale, DuPage County, IL. The aircraft struck the ground in a slightly left-wing-low and nosedown attitude on a heading of approximately true North. The aircraft disintegrated, leaving debris over an area 200 feet wide and 1,100 feet long.

Probable Cause:

PROBABLE CAUSE: "The loss of an AN-175-21 nickel steel bolt from the parallelogram linkage of the elevator boost system, resulting in loss of control of the aircraft."

Accident investigation:

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Investigating agency: CAB
Status: Investigation completed
Duration: 1 year and 4 months
Accident number: File No. 1-0011
Download report: Final report


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Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Chicago-Midway Airport, IL et Las Vegas-McCarran International Airport, NV est de 2425 km (1516 miles).
Accident location: Approximate; accuracy within a few kilometers.

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
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Lockheed L-049

  • 88 built
  • 22ème loss
  • 14ème accident fatal
  • le accident The le plus grave (à ce moment là)
  • le accident 2ème le plus grave (en ce moment)
» safety profile

 Etats-Unis d'Amérique
  • le accident 3ème le plus grave (à ce moment là)
  • le accident 32ème le plus grave (en ce moment)
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