(he was the only witness called by defendants who testified to any of the conditions surrounding the accident), the ceiling at Peterson was then only 800 to 1000 feet. At 3:59 P.M., the plane crashed into Bald Eagle Mountain5 while in a level flight cruise condition, heading due west during a heavy snowstorm. The pilot and both passengers were killed in the crash.
Altoona Aviation Corporation appeals from a judgment for plaintiffs entered on December 7, 1967, after judgment n. o. v. had been entered for plaintiffs on the liability issues following a jury verdict at the first trial in defendants’ favor, which was followed by a second jury trial limited to the damage issues.6
Since substantially all of the plaintiff’s evidence was adduced by testimony, the appellant claims that the District Court was precluded from entering a judgment n. o. v. by the Pennsylvania oral evidence rule,7 which provides, according to appellant, that it is the province of the jury in trespass cases, where oral testimony is concerned, to pass upon the credibility of witnesses, even though uncontradicted by defendant’s witnesses or even though defendant introduces no testimony at all. We find it unnecessary to determine the extent of this Pennsylvania rule or its application to the situation presented in the case now before the court.
Irrespective of the applicability of the above Pennsylvania oral evidence rule, which cannot be determined with certainty by a federal court in view of the language in the Pennsylvania cases, the federal decisions make clear that, insofar as this rule attempts to define when the jury must decide, as its function, whether the particular elements of liability exist, it would be operating in a field reserved for federal law. See Lind v. Schenley Industries, Inc., 278 F.2d 79, 84 (3rd Cir.), cert. den. 364 U.S. 835, 81 S.Ct. 58, 5 L.Ed.2d 60 (1960); Denneny v. Siegel et al., 407 F.2d 433, (3rd Cir. 1969), and cases there cited. Where the party having the burden of proof produces evidence which establishes the facts in his favor so clearly that reasonable men could have no doubt, he is entitled to a verdict directed in his favor. Byrd v. Blue Ridge Cooperative, 356 U.S. 525, 78 S.Ct. 893, 2 L.Ed.2d 953 (1958); Herron v. Southern Pacific Company, 283 U.S. 91, 51 S.Ct. 383, 75 L.Ed. 857 (1931).8 Therefore, the standard against which judgment n. o. v. must be tested is the standard contained in Mihalchak v. American Dredging Company, 266 F.2d 875, 877 (3rd Cir. 1959), where we said:
“The question raised by plaintiff’s motion * then, is whether he had so well succeeded in carrying his burden of producing evidence that he
5
Bald Eagle Mountain is about 10 miles southwest of Phillipsburg and 15 miles northeast of Peterson Field, and is due west of University Park. The plane crashed at an altitude of 2600 feet, 150 feet below the summit of the mountain.
6
The opinion of the District Court is reported at 268 F.Supp. 599 (W.D.Pa. 1967), where it is made clear at 602 that plaintiff’s motion for a directed verdict made at the close of the evidence was denied and plaintiff moved for judgment n.o.v. as provided by F.R.Civ.P. 50(b).
7
See discussion of this rule and Pennsylvania appellate court decisions at pages 602-605 (268 F.Supp.) of the District Court opinion cited in footnote 6.
8
Summary judgment in favor of plaintiff has been granted on facts similar to those in this record and such action approved by the Oourt of Appeals for the District of Columbia. See American Airlines v. Ulen, 87 U.S.App.D.C. 307, 186 F.2d 529 (1949). The power of a federal judge to grant a directed verdict for either party has been consistently recognized. See Leach v. Burr, 188 U.S. 510, 513, 23 S.Ct. 393, 47 L.Ed. 567 (1903) ; Galloway v. United States, 319 U.S. 372, 389, 63 S.Ct. 1077, 87 L.Ed. 1458 (1943) ; Allen Industries, Inc. v. National Sponge Cushion, Inc., 292 F.Supp. 504 (D.N.J.1967), aff’d. 403 F.2d 717 (3rd Cir. 1968), cert. den., 394 U.S. 920, 89 S.Ct. 1194, 22 L.Ed.2d 453 (1969) ; cf. Ex Parte Petersen, 253 U.S. 300, 309-310, 40 S.Ct. 543, 64 L.Ed. 919 (1920).