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Accident
Last updated: 19 October 2017
Status:Definitief
Datum:vrijdag 3 mei 1968
Tijd:16:48
Type:Silhouette image of generic L188 model; specific model in this crash may look slightly different
Lockheed L-188A Electra
Luchtvaartmaatschappij:Braniff International Airways
Registratie: N9707C
Constructienummer: 1099
Bouwjaar: 1959
Aantal vlieguren:20958
Motoren: 4 Allison 501-D13A
Bemanning:slachtoffers: 5 / inzittenden: 5
Passagiers:slachtoffers: 80 / inzittenden: 80
Totaal:slachtoffers: 85 / inzittenden: 85
Schade: Vernield
Gevolgen: Written off (damaged beyond repair)
Plaats:1,6 km (1 mijl) E of Dawson, TX (   Verenigde Staten)
Fase: Kruisvlucht (ENR)
Soort vlucht:Binnenlandse lijnvlucht
Vliegveld van vertrek:Houston-William P. Hobby Airport, TX (HOU/KHOU), Verenigde Staten
Vliegveld van aankomst:Dallas-Love Field, TX (DAL/KDAL), Verenigde Staten
Vluchtnummer: 352
Beschrijving:
Braniff Flight 352 departed Houston (HOU) at 16:11 for a flight to Dallas (DAL) and climbed to FL200. Some 25 minutes into the flight, the L-188A Electra was approaching an area of severe thunderstorm activity. The crew requested a descent to FL150 and a deviation to the west. ARTCC then advised the crew that other aircraft were deviating to the east. The Electra crew still thought it looked all right on the west and were cleared to descend to FL140 and deviate to the west. At 16:44 the flight was further cleared to descend to 5000 feet. At 16:47 the aircraft had apparently encountered an area of bad weather, including hail, and requested (and were cleared for) a 180deg turn. Subsequent to the initiation of a right turn, the aircraft was upset. During the upset, N9707C rolled to the right to a bank angle in excess of 90deg and pitched nose down to approximately 40 degrees. A roll recovery maneuver was initiated and the aircraft experienced forces of 4,35 g. Part of the right wing failed and the aircraft broke up at an altitude of 6750 feet and crashed in flames a little later.

Probable Cause:

PROBABLE CAUSE: "The stressing of the aircraft structure beyond its ultimate strength during an attempted recovery from an unusual attitude induced by turbulence associated with a thunderstorm. The operation in the turbulence resulted from a decision to penetrate an area of known severe weather."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 2 months
Accident number: NTSB/AAR-69-03
Download report: Final report


Veiligheidsmaatregelen
The FAA issued an Airworthiness Directive, effective November 6, 1968, requiring all known US operators of Lockheed Model 188A and 188C airplanes to inspect the No. 1 wing plank at engine nacelles 2 and 3 for cracks, and to repair those cracks found as necessary.

Following this accident large segments of the aviation industry started reviewing, amending, and updating safety and training programs and
operational procedures regarding storm avoidance.

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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 Houston-William P. Hobby Airport, TX en Dallas-Love Field, TX bedraagt 384 km (240 miles).
Accident location: Exact; as reported in the official accident report.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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Lockheed L-188

  • 222 built
  • 12e ongeval
  • 9e dodelijk ongeval
  • The zwaarste ongeval (toen het plaatsvond)
  • 4e zwaarste ongeval (op dit moment)
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 Verenigde Staten
  • 4e zwaarste ongeval (toen het plaatsvond)
  • 23e zwaarste ongeval (op dit moment)
» safety profile