As tried, this diversity action claimed strict liability for the manufacture and sale of a defective tire which injured plaintiff when it exploded during mounting. Defendant contended the cause of plaintiff’s injury was misuse by attempting to mount the 750 X 16 tire on a 16.5-inch rather than 16-inch rim.
The portion of the pretrial order relevant to this appeal set out plaintiff’s claims as follows:
Plaintiff Eli Trujillo contends that the defendant Uniroyal Corporation manufactured and sold a defective tire and at the time the said tire was being installed by Eli Trujillo in a customary and usual manner with due caution and circumspection, and in a safe, proper and prudent *817 manner the said tire by reason of a defect blew up resulting in the plaintiff Eli Trujillo being severely, seriously and permanently injured. The plaintiff contends that Uniroyal Corporation is strictly liable under the rule of strict liability for the injuries and damages sustained by Eli Trujillo.
Record, vol. 1, at 83. Upon learning shortly before trial that the plaintiff planned to prove that defendant was liable on a “failure to warn” theory, defendant’s counsel contended that the plaintiff was attempting to change the theory of his case. The trial court agreed and rejected Trujillo’s tendered evidence 1 and jury instructions on the failure to warn issue. The jury found for the defendant tire company.
Trujillo contended that failure to warn was an appropriate issue under strict liability law in New Mexico. According to Trujillo, the tire sold by Uniroyal was in defective condition because there was no warning of the risk of serious personal injury to a tire mounter from: (1) attempting to mount a 16-inch tire on a 16.5-ineh rim, and (2) inflating to over 40 pounds per square inch pressure while mounting.
Plaintiff testified that on the date of the accident he was attempting to mount a 750 X 16 tire on what he believed to be a 16 — inch rim for a customer of the service station where he worked. He was using a tire mounting machine and was following his usual procedures when he placed the tire on the rim. He was unable to get the bead of the tire to seat against the flange of the rim at some 30 to 32 pounds of pressure per square inch, so he took the tire off and relubricated with tire lubricant. He again placed the tire on the tire mounting machine and this time inflated it to 48 pounds per square inch, but four or five inches of the bead was not seating. As he was inserting additional air, the explosion occurred.
SCOPE OF THE PRETRIAL ORDER
A “definitive pre-trial order reflecting the agreement of the parties, having been entered into after full discovery, must, of course, control the subsequent course of the action. F.R.Civ.P. 16(6).”
Case v. Abrams,
The power afforded the trial court to exclude issues or evidence from trial, however, must be derived from a
proper
pretrial order. A proper pretrial order, as envisioned by the drafters of Fed.R.Civ.P. 16, is “definitive.”
See Case v. Abrams,
Proper pretrial orders are indeed powerful, but even at their best they should be “liberally construed to cover any of the legal or factual theories that might be embraced by their language.”
Rodrigues v. Ripley Industries, Inc.,
The order in this case may be somewhat more brief than the pleadings, but it is no more precise; consequently, we see no reason to construe it with more precision than pleadings generally, which may be liberally amended, particularly when the court is notified before trial of the intention of a party to pursue a certain issue. See Fed.R. Civ.P. 15. When an adverse party is content with a boilerplate pretrial order, it cannot later demand that the trial court enforce it as though it were a specific and meaningful narrowing of the issues. Indeed, had Uniroyal deemed it necessary to clarify the particular strict liability theory relied upon by Trujillo, it could have used the pretrial process for this intended purpose.
Construing the pretrial order in this case with the generality evidenced by its wording, we see no basis for finding that “the rule of strict liability” as referred to in the order does not encompass all three “defects” developed in the comments to the Restatement (Second) of Torts § 402 A
(1965)
— i.
e.,
manufacturing flaw, design defect, and failure to warn.
See Burton v. L. O. Smith Foundry Products,
The inadequacy of the pretrial order as a limiting device in this ease may be illustrated in distinguishing two cases cited by the appellees. In
Rodrigues v. Ripley Industries, Inc.,
Rigby v. Beech Aircraft Co.,
HARMLESS ERROR
Uniroyal contends that, even if the rejected evidence had been admitted at trial and appropriate instructions had been given, the evidence as a whole would not have been sufficient to support a verdict for Trujillo.
See Hallmark Industry v. Reynolds Metals Co.,
We agree that, under New Mexico law, a warning of a danger known to the user is unnecessary.
Skyhook Corp.
v.
Jasper,
If warned of the very serious consequences of attempting to mount a 16-inch tire on a 16.5-inch rim, Trujillo may have taken precautions he disregarded in this case. While the evidence may be strong that no warning would have overcome Trujillo’s mistaken belief as to the size of the tire, he nonetheless was entitled under the failure to warn theory to present the jury with that possibility.
It is even clearer that failing to give instructions and excluding evidence on the desirability of a warning against overinflation was not harmless error. Trujillo did introduce evidence from which it could be inferred that overinflation of the tire was a cause of the explosion. Trujillo’s expert, Dr. Alan Milner, testified that explosions occur when the mounter increases the inflation pressure in an attempt to set the tire onto the bead seat; the tire is pressed against the rim and the bead wires break in a consecutive fashion because they are not equally sharing the force of inflation. Record, vol. 3, at 261-69. Jerry Leyden, an expert testifying for Uniroyal, agreed that the wires in a tire may break “[w]hen there’s excessive inflation.” Id., vol. 4, at 451. Dr. Milner described the high pressure marks which he found on the tire, id., vol. 3, at 315, and contradicted Trujillo’s understanding that he could inflate to a service pressure of 60-65 pounds per square inch while mounting. Id. at 319. Dr. Milner added that under the circumstances he would not have inflated to more than 40 pounds. Id.
We cannot say that a jury could not find for Trujillo if properly instructed. Because of the improper rejection of the failure to warn issue, we must reverse this case.
Notes
. Trujillo tendered the following exhibits: (1) a Delta 750 X 16 tire of recent manufacture (by Uniroyal) carrying an inflation pressure of 60 p. s. i. and labeled with a mounting warning not to exceed 40 p. s. i.; (2) a Uniroyal tire showing inflation pressure of 60 p. s. i.; (3) an O.K. tire, manufactured by Uniroyal, showing inflation pressure of 60 p. s. i. labeled with mounting warning not to exceed 40 p. s. i. and a warning reading: Caution — Do not use on 16.5 inch diameter rims; (4) an O.K. tire, manufactured by Uniroyal, labeled with mounting warning not to exceed 40 p. s. i.
. For an excellent discussion of the requirements, procedures and purposes of a proper pretrial order, see Honorable A. Sherman Christensen,
The Pre-Trial Order,
