This аppeal presents the question of whether appellant introduced sufficient evidence to have the issue of liability based on § 402A of the Restatement (Second) of Torts (1965) 1 submitted to the jury. The court below *132 held that appellant’s evidence was deficient and entered a compulsory nonsuit in favor of appellees at the conclusion of appellant’s case. We disagree with this dеcision and remand for a new trial.
Appellant’s complaint in trespass alleged inter alia the following facts: On August 12,1968, appellant purchased from Null Ford Sales, Inc., (hereinafter referred to as “Null”) a new 1968 truck manufactured by Ford Motor Company (hereinafter referred to as “Ford”); seventeen days later the Ford truck suddenly caught fire so as to damage and destroy the interior of the cab, the engine, and certain other parts оf the truck; the fire resulted from a defective condition in the truck that existed at the time it was sold by Ford and also from the negligence of Ford’s employees and Null’s employees. 2
After several subsequent pleadings were filed, the case proceeded to trial where the following testimony was introduced into evidence: Kenneth W. Emory testified that he was employed by aрpellant on the day the truck caught fire. He was one of two men who operated the truck that day. On the day in question, he and another of appellant’s employees were at the site of a strip mine drilling holes in which dynamite was later to be placed. The *133 truck was used to transport the drill from hole to hole. Somewhere between the tenth and fifteenth holes that wеre drilled that day the drill broke. Emory and his partner then decided to leave the area and travel to town in a pickup truck (not the Ford) to obtain the part needed to fix the drill. Emory testified that when they left the area the truck engine was turned off, its doors were closed, the windows were up, there was no one else in the area, and there was no evidence of any fire at that time. Approximately one hour after they were gone, they received word over their two-way radio that the Ford truck was on fire back at the mine. When they returned, Emory noticed that the Ford truck was in the same position as it had been when they left and the doors were still closed. However, the cab of the truck was burned to such an extent that the glass had melted. Emory did nоt have occasion to examine under the hood of the truck to determine the extent of the fire in that area. However, Emory did notice that certain jumper cables kept behind the seat in the cab had not come in contact with a reserve battery that was kept on the floor board in the cab and was still covered. Emory’s testimony also made it clear that the Ford truck had been functioning properly prior to the fire.
Wáyne Layhue, Emory’s working partner, was the next witness to testify for appellant. His testimony reaffirmed the fact that the truck had been operating normally that morning and that there was no evidence of any fire when he and Emory departed for town. According to Layhue, the truck had been turned off a half hour before thеy had left for the parts. Layhue substantially made the same observations testified to by Emory. Layhue also added that he did not do anything to cause the fire.
J. R. Cornell, owner of appellant corporation, testified that he had purchased the Ford truck new from Null and that it had only 35 miles on its odometer when it caught fire. He agree with the two prior witnesses that there *134 had been no trоuble with the truck up to the time it caught fire. According to Cornell, nothing had been altered on the truck by appellant although Null had extended the truck’s chassis several inches prior to delivering it to appellant. Cornell testified that the interior of the cab had been burnt more severely than the area under the hood. Cornell admitted that he did not know the cause of the fire.
The final witness, Norman Sharp, the service manager of Null, was called by appellant. Because appellant failed to list Sharp as an expert in its pre-trial statement, the court refused to permit Sharp to give his opinion that the electrical system on this type of truck was insufficiently fused. However, Sharp was allowed to testify that he could not determine the cause of the fire be-caus “everything was burnt beyond the possibility of the identification of it.” Notes of Testimony at 69-70. Sharp further testified that there was no evidence of any fire in the rear area of the truck but that the fire basically was confined to the area of the cab and under the hood. According to Sharp, no one at Null ever checked the fuses in the truck’s electrical system and he did not know if the proper fuses were at the proper circuits on the truck. Sharp also noted that after the fire the fuse box in the truck was completely destroyed.
To eliminate the necessity of appellant’s calling another witness the parties stipulated that, if called, Ford’s expert, a Mr. McDonald, would testify that “there was no evidence of an external cause for the fire, that there was no evidence that the drilling rig . . . caused the fire, that there is no evidence that the extension of the chassis . . . caused the fire, and that there is no evidence that the battery terminals or the cables which are attached to the battery terminals . . . caused the fire.” Notes of Testimony at 79.
Appellant then rested on the issue of liability. The court entertained Ford’s and Null’s motion for a com *135 pulsory nonsuit and after argument granted it. The court en banc affirmed the trial judge’s order granting the nonsuit. The basis for the lower court’s decision was that appellant had failed to prove a defective condition unreasonably dangerous to the user or consumer or its property as required by § 402A of the Restatement (Second) of Torts (1965). The court found that appellant’s evidence only established a fire in a truck that was not in operation. “[H]ad the truck caught fire for unexplained reasons while it was in operation,” reasoned the lower court, “evidence of a malfunction [might have been] presented.” Printed Record at 119a. But because there was no evidence оf a specific defect nor evidence of a malfunction during the normal operation of the truck, the court below found that the jury would be forced to speculate over the cause of the fire from the almost limitless range of possibilities that existed.
“On appeal from a compulsory nonsuit the plaintiff must be given the benefit of every fact and every reasоnable inference of fact arising from the evidence, whether direct or circumstantial, and all conflicts must be resolved in the plaintiff’s favor. A compulsory nonsuit may be entered only in a clear case where the facts and circumstances lead unerringly to but one conclusion.”
Paul v. Hess Bros.,
As correctly observed by the lower court, for appellant to submit his case to thе jury on the theory of strict liability under § 402A of the Restatement (Second)
*136
of Torts (1965), it was necessary to “prove that the product was defective, and . . . that the defect was a proximate cause of the plaintiff’s injuries.”
Berkebile v. Brantly Helicopter Corp.,
Although it is helpful for a plaintiff to have direct evidence of the defective condition which caused the injury or expert testimony to point to that specific defect, such evidence is
not
essential in a strict liability case based on § 402A.
See Bialek v. Pittsburgh Brewing Co.,
*137
Accordingly, a plaintiff may often rely on cirсumstantial evidence, and the inferences that may reasonably be drawn therefrom, to prove his case. Although the mere happening of an accident does not establish liability,
Berry v. Lintner,
The court below considered MacDougall and its progeny but found those cases inapplicable because the Ford truсk was not in operation at the time of the fire and therefore no “malfunction” occurred. Because no spe *138 cific defect was established by appellant, a nonsuit was entered. We cannot agree with this treatment of the case by the lower court.
The definition of “malfunction” lends support to the decision of the lower court. “Malfunction” has been defined as “to function badly or imperfectly: fail to operate in the normal or usual manner.” Webster’s Third New International Dictionary 1367 (1963). Because the Ford truck was not in operation when it was observed to be on fire, it would semantically be incorrect to say that it was malfunctioning at that time. However, is a manufacturer to escape liability under all circumstances when a рroduct not in use catches on fire and the injured party is unable to point to the specific defect causing the fire?
A review of current case law reveals that it is quite common for fires to occur in motor vehicles while they are in operation.
Wear v. Chenault Motor Co.,
We refuse to adopt the superficial distinction that proof of a malfunction is the only circumstantial evidence available from which a “defective condition” in a product can be inferred. Were we to do so we would be committing the same practice condemned by the Supreme Court in
Gilbert v. Korvette’s Inc.,
Evidencе of a malfunction is but one piece of circumstantial evidence that can be used to elicit the inference that a product was in a “defective condition.” “‘[A] defect can be inferred from unexplained occurrences’ and need not be directly proved.”
D’Antona v. Hampton Grinding Wheel Co.,
supra,
Various casеs have demonstrated that from certain circumstantial evidence it may be inferred that the product was defective. In
Bialek v. Pittsburgh Brewing Co.,
supra, a beer bottle exploded spontaneonsly as it was being handled. Although this was not a “malfunction” type case and there was no proof of a specific defect, the Supreme Court observed that the testimony that the bottle explоded was sufficient to make the issue of liability a jury question.
Id. Bombardi v. Pochel’s Appliance and T. V. Co.,
supra, presents a case where a television set that was not being used caught fire in the middle of the night. Again the product was not in use so technically a “malfunction” did not occur and it was impossible for the plaintiff to show a defect by direct evidence because the television had been totally destroyed by the fire. Nevertheless, the Court permitted plaintiffs to establish a defective condition by circumstantial evidence. Although some of this evidence consisted of expert testimony as to “possible” defective components that rendered the television fire prone and testimony as to the care
*141
of the television by plaintiffs, the Court also noted that “there are some accidents as to which there is common experience dictating that they do not ordinarily occur without a defect, and as to which the inference that a product is defective should be permitted.”
Id.,
We must now review the circumstantial evidence presented by appellant to determine whether it was sufficient to permit the inference that the Ford truck was in a defective condition when it left the manufacturer. First, there was testimony that the parts in the truck were burnt beyond the possibility of identification so that Null’s service manager was unable to determine the cause of the fire. However, the service manager did testify that no one at Null checked the fuses or determined whether they were in their proper locations. Second, the owner of appellant corporation testified that the fire occurrеd in the truck soon after it was purchased and it had been driven only 35 miles. Third, appellant’s other witnesses testified that they did not cause the fire and did not observe anything to lead them to believe that someone else caused the fire and Ford and Null stipulated that “there was no evidence of an external cause for the fire . . . . ” Notes of Testimony at 79. It should also be noted that the physical evidence indicated that the fire originated in the cab and engine areas of the truck. Lastly, we find as did the Court in Bombardi that this is not the type of accident (under the facts of this case) that would occur without some type of defective condition in the truck.
*142 We are unable to conclude that the facts presented by appellant point unerringly to the sole conclusion of non-liability. Taking appellant’s evidence in its most favorable light, we are of the opinion that a reasonable jury could have inferred from the facts and circumstances that the Ford truck was in a defective condition at the time it left,Ford’s control.
Order reversed and case remanded for a new trial.
Notes
. The Pennsylvania Supreme Court in
Webb
v.
Zern,
(1) One who sells any product in a defeсtive condition unreasonably dangerous to the user or consumer or to his property is subject to liability for physical harm thereby caused to the ultimate user or consumer, or to his property, if
(a) the seller is engaged in the business of selling such a product, and
(b) it is expected to and does reach the user or consumer without substantial change in the condition in which it is sold.
(2) The rule stated in Subsection (1) applies although
(a) the seller has exercised all possible care in the preparation and sale of his product, and
(b) the user or consumer has not bought the product from or entered into any contractual relation with the seller.
. No argument has been presented on appeal as to the propriety of the lower court’s granting a nonsuit as to appellant’s theory of liability based upon negligence.
