In this Texas diversity suit plaintiff, Billie Kelly, while a passenger on an American Airlines 747 flight from Dallas, Texas to San Juan, Puerto Rico, in August 1971, was injured when the tail section of the 747 experienced a severe and sudden jolt approximately 500 miles from San Juan. The district judge, without a jury, denied plaintiff recovery against American Airlines, Inc., holding that she failed to prove any negligence. The trial court, in deciding the case, refused plaintiff’s request to apply the doctrine of res ipsa loquitur to air turbulence cases. We affirm.
The main issues raised on appeal are (1) whether the doctrine of res ipsa lo-quitur formerly limited to airplane crashes 1 should be extended to apply to air turbulence cases in general, and (2) whether the particular facts of this case warrant its application.
Under Texas law the principal requisites necessary to invoke the doctrine of
res ipsa loquitur
are (1) the accident would not have occurred in the ordinary course of events without negligence by the defendant, and (2) the defendant had exclusive control of the instrumentality. Owen v. Brown, Tex., 1969,
However, even assuming that severe jolts in flight do not ordinarily occur without negligence by the airline, the evidence in this case suggests a credible explanation for the turbulence which involves no negligence by the airline or its employees. Two possible theories are presented as the cause of the turbulence. Plaintiff attributes the jolt to weather-produced turbulence and alleges pilot negligence in failing to warn the passengers was the cause of her injury. Based on its experts’ testimony and area weather reports, defendant concludes that wing tip vortices due to passing aircraft, which the pilot could neither foresee nor avoid, produced the turbulence. Confronted with two plausible explanations, one suggesting defendant’s negligence and one not, the trial court was correct in finding that res ipsa loquitur was inappropriate in this case.
Furthermore, the application of
res ipsa
would not change the outcome of this case. In Texas,
3
the doctrine op
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erates as an inference rather than a presumption of negligence, which merely shifts the burden of going forward with the evidence. The plaintiff continues to have the burden of persuasion by a preponderance of the evidence. Mobile Chem. Co. v. Bell, Tex.,
Affirmed.
Notes
. Cox v. Northwest Airlines, Inc., 7 Cir., 1967,
. Gafford v. Trans-Texas Airways, 6 Cir., 1962,
. The district judge and both parties accept Texas law as controlling on this issue. See also United Air Lines v. Wiener, 9 Cir., 1964,
