This action was brought in the United States District Court for the Southern District of New York to recover damages for the wrongful death of Jasper W. Hall, a resident of South Carolina, who was killed in California in the crash of an airplane operated by defendant-respondent Transocean Air Lines. Plaintiffs, petitioners here, are
*294
the decedent’s South Carolina-appointed administrator, decedent’s widow, and decedent’s minor child, who sues through the widow, her mother, appointed her guardian
ad litem
by the District Court. Federal jurisdiction was predicated solely on diversity of citizenship — the administrator being a New York resident, the widow and child South Carolina residents, the airline a California corporation with its principal place of business in California— and the substantive basis of the claim was California’s Wrongful Death Statute, Cal. Code Civ. Proc. § 377, made applicable by the New York choice-of-law rules, see
Baldwin
v.
Powell,
The writ brought here several points decided adversely to petitioners below. We need discuss only one issue, for its determination disposes of the case. The
Sears
and
Haro
cases, regarded by the District Court and the Court of Appeals as controlling the effect upon a claim for wrongful death of the running of the Statute of Limitations upon one but not upon another of the decedent’s heirs (the latter being under a limitations-tolling disability), were decided in 1930 and 1936, respectively, and
Gates
in 1938, by California District Courts of Appeal. In December 1959, the Supreme Court of California,
en banc,
decided
Leeper
v.
Beltrami,
This case was handed down after the District Court’s ruling granting summary judgment for respondent in the present litigation, and only shortly before argument in the Court of Appeals. It was not brought to the attention of, and was not considered by, that court. Inasmuch as the view expressed therein by the highest court of California may be decisive of an issue critical to petitioners’ claims, and inasmuch as the Court of Appeals for the Second Circuit is charged with mandatory appellate review in the present case, that court should decide what relative weights, as authoritative sources for ascer *296 taining California law, the New York Court of Appeals would accord to the Sears-Haro line (direct holdings of District Courts of Appeal between 1930 and 1938) and to Leeper (a considered, relevant dictum of general scope by the California Supreme Court in 1959). We set aside the judgment of the Court of Appeals and remand to that court for reconsideration of the case in light of the new factor introduced by Leeper v. Beltrami, supra.
So ordered.
