ASN logo
Accident
Last updated: 23 October 2017
Status:Definitief
Datum:zondag 17 september 1961
Tijd:08:57
Type:Silhouette image of generic L188 model; specific model in this crash may look slightly different
Lockheed L-188C Electra
Luchtvaartmaatschappij:Northwest Orient Airlines
Registratie: N137US
Constructienummer: 1142
Bouwjaar: 1961
Aantal vlieguren:614
Motoren: 4 Allison 501-D13
Bemanning:slachtoffers: 5 / inzittenden: 5
Passagiers:slachtoffers: 32 / inzittenden: 32
Totaal:slachtoffers: 37 / inzittenden: 37
Schade: Afgeschreven
Gevolgen: Written off (damaged beyond repair)
Plaats:ca 1,5 km S of Chicago-O'Hare International Airport, IL (ORD) (   Verenigde Staten)
Fase: InitiŽle klim (ICL)
Soort vlucht:Binnenlandse lijnvlucht
Vliegveld van vertrek:Chicago-O'Hare International Airport, IL (ORD/KORD), Verenigde Staten
Vliegveld van aankomst:Tampa International Airport, FL (TPA/KTPA), Verenigde Staten
Vluchtnummer: 706
Beschrijving:
Lockheed Electra N137US operated on Northwest flight 706 from Milwaukee to Miami (MIA) with intermediate stops at Chicago, Tampa and Fort Lauderdale. After a crew change at Chicago the plane taxied to runway 14R at 08:55 and was cleared for takeoff. Between the 8,000 and the 9,000-foot runway marker the aircraft was observed to commence an apparently coordinated right turn with a slowly increasing rate of bank. When the bank angle was 30 to 45 degrees, the crew made a short, garbled transmission. Immediately thereafter, at a bank angle of 50 to 60 degrees, the aircraft began to lose altitude. The maximum altitude attained in the entire turn was 200 to 300 feet. The right wing struck powerlines adjacent to the Chicago Northwestern Railroad tracks, severing the lines at an angle of about 70 degrees from the horizontal. It then continued in a direction of about 271 degrees magnetic and, when in a bank of about 85 degrees and a nose-down attitude of about 10 degrees, the right wing of the aircraft struck the railroad embankment.
Continuing to roll about its longitudinal axis, the aircraft cartwheeled, the nose crashing into the ground 380 feet beyond the point of first impact, and landed right side up. It then slid tail first another 820 feet. The aircraft disintegrated throughout its path.

Probable Cause:

PROBABLE CAUSE: "Mechanical failure in the aileron primary control system due to an improper replacement of the aileron boost assembly, resulting in a loss of lateral control of the aircraft at an altitude too low to effect recovery."



Foto's

photo of Lockheed L-188C Electra N137US
photo of Lockheed L-188C Electra N137US
photo of Lockheed L-188C Electra N137US
Add your photo of this accident or aircraft
 

Kaart
Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen Chicago-O'Hare International Airport, IL en Tampa International Airport, FL bedraagt 1620 km (1012 miles).
Accident location: Approximate; accuracy within a few kilometers.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Networkís opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
languages: languages

Share

Lockheed L-188

  • 222 built
  • 7e ongeval
  • 6e dodelijk ongeval
  • 4e zwaarste ongeval (toen het plaatsvond)
  • 12e zwaarste ongeval (op dit moment)
» safety profile

 Verenigde Staten
  • 34e zwaarste ongeval (toen het plaatsvond)
  • 92e zwaarste ongeval (op dit moment)
» safety profile