OPINION
Janelle and David Preston Cox appeal the summary judgment entered in favor of May Department Store Company (“May”) and Montgomery Elevator Company (“Montgomery”). For the following reasons, we reverse and remand.
FACTUAL 1 AND PROCEDURAL BACKGROUND
On December 29, 1990, Janelle Cox (“Cox”) was ascending the escalator at Rob
Robinson’s had contracted with Montgomery to maintain the escalator. Eleven days prior to the accident, Montgomery inspected the escalator and found that no maintenance was required. Montgomery also inspected the escalator approximately two weeks after the accident and again found no need for maintenance. Also, the City of Phoenix had inspected the escalator four months before the accident, and again two months after it, and found no problems or defects on either occasion.
Cox and her husband (collectively “plaintiffs”) filed a timely complaint against May and Montgomery (collectively “defendants”). Plaintiffs’ first cause of action alleged that May was negligent in 1) failing to provide and maintain their premises in a reasonably safe condition; 2) providing and maintaining a hazardous condition on their premises; and 8) failing to warn of the hazardous condition. Their second cause of action alleged that Montgomery was negligent in 1) the design, manufacture, installation, maintenance, repair and service of the escalator; and 2) the failure to warn of the hazardous condition. Plaintiffs also stated a third cause of action against defendants which merely invoked the doctrine of res ipsa loquitur.
Defendants moved for summary judgment, arguing that plaintiffs had neither evidence of a defect in the escalator, nor of negligence on the part of defendants, and that res ipsa loquitur was not applicable to this case. With their response, plaintiffs submitted the affidavit of Dean Jacobsen (“Jacobsen”), which averred that 1) he was a mechanical engineer qualified to offer expert testimony regarding escalators; 2) he had examined the escalator and Cox’s jacket; 3) the accident would not have occurred had the escalator been properly maintained and designed; and 4) the escalator was either dangerously designed or improperly maintained. Defendants then filed a motion to strike Jacobsen’s affidavit, arguing that it was untimely and contained conclusory opinions not supported by a factual basis.
Following oral argument, the trial court found that plaintiffs had presented no evidence of either a specific defect in the escalator or an act of negligence on the part of defendants. The court further concluded that res ipsa loquitur did not apply in this case. It therefore granted summary judgment in favor of defendants. Because of the summary judgment, the court found that defendants’ motion to strike Jacobsen’s affidavit was moot, and therefore denied the motion without prejudice.
Plaintiffs timely appealed the summary judgment. We have jurisdiction pursuant to Ariz.Rev.Stat.Ann. (“A.R.S.”) section 12-2101(B).
DISCUSSION
A. Standard of Review
On an appeal from summary judgment, this court reviews the record
de novo
and applies the same standard as the trial court.
United Bank v. Allyn,
167 Ariz 191, 195,
B. Res Ipsa Loquitur
“Res ipsa loquitur
is ‘a theory of circumstantial evidence under which the jury may reasonably find negligence and causation from the fact of the accident and the defendant’s relation to the accident.’ ”
Ward v. Mount Calvary Lutheran Church
The necessary elements of res ipsa loquitur in Arizona have been:
1. The accident must be of a kind which ordinarily does not occur in the absence of negligence; 2
2. The accident must be caused by an agency or instrumentality within the exclusive control of the defendant;
3. The accident must not have been due to any voluntary action on the part of the plaintiff; and
4. The plaintiff must not be in a position to show the particular circumstances which caused the offending agency or instrumentality to operate to her injury.
Ward,
1. Likelihood of Negligence
[5] The trial court concluded, and we agree, that this type of accident would not likely have occurred without negligence on someone’s part. This first element merely requires a weighing of the probabilities of the cause of the accident.
Tucson Gas & Elec. Co. v. Larsen,
The jury, in turn, may find negligence based upon either its common knowledge, which generally is “past experience that is common to the community,” or, where such common knowledge is lacking, through expert testimony that such an accident does not usually occur absent negligence.
Ward,
We conclude that it is permissible for a trier of fact to find that the accident in the instant case would not likely have occurred without negligence. Cox was ascending the escalator in a normal fashion and wearing a normal jacket when her jacket became caught under the handrail. Its common experience with escalators would allow the jury to infer that such an accident would not occur absent the negligent design, construction, maintenance, inspection, or repair of the escalator.
See McDonald,
Furthermore, even if such common knowledge were lacking, plaintiffs presented expert evidence in the form of an affidavit from a mechanical engineer who had inspected the escalator and opined that Cox’s accident could only have occurred if the escalator had been improperly designed or maintained.
2. Defendants’ Control
The second element requires that the instrumentality causing the accident be within the exclusive control of defendants. The trial court concluded that this element was not satisfied:
The Plaintiff argues that the accident was caused by the escalator. With this the Court disagrees. The accident was caused by the Plaintiffs jacket getting caught in the handrail of the escalator. This circumstance is as much within the control of the Plaintiff as it is the Defendants.
We disagree, however, with the trial court’s analysis. This element of res ipsa loquitur involves the control over the instrumentality that caused the accident, not the control over the other steps leading up to the accident.
An analysis akin to the trial court’s was rejected in Larsen, where plaintiffs automobile struck a guy wire that had dropped across the road as a result of a broken power pole. The court in Larsen stated:
Defendant argues that exclusive control ... was not present because the automobile, a factor in the occurrence, was in the plaintiffs control. We are not impressed with this argument because it loses sight of the meaning of this element of the doctrine. The “control” with which the doctrine is concerned, is that control exercised over the offending instrumentality, which in this case was the guy wire. There is no question that the defendant was in exclusive control of the installation of the guy wire and power pole.
Defendants, though, argue that Cox, not defendants, had exclusive control over
how she was using the escalator. Again, this misconstrues the concept of control at issue in
res ipsa loquitur.
The doctrine’s requirement of exclusive control refers to control over the operation of the instrumentality or to the “authority to authorize the use of the agency or instrumentality.”
Id.
“Control” under
res ipsa loquitur
thus corresponds to responsibility for the instrumentality,
see McDonald,
[t]o control the escalator would be to have the capability of starting or stopping it, increasing or decreasing its speed, increasing or decreasing the relative speeds of the steps and the handrail, increasing or decreasing the gaps that existed between the handrail and the underlying structure, the cleaning and general maintenance, etc.
Applying the appropriate concept of control, there is no evidence to suggest that defendants were not in exclusive control of the escalator.
Defendants next argue that this element is not satisfied because the instrumentality at issue was Cox’s jacket, not the escalator. We, however, disagree. The evidence, for summary judgment purposes, reflects that the jacket was an ordinary one, and that Cox was riding the escalator in a normal manner. Assuming these facts, the cause of the accident must have been the escalator, not the jacket. We therefore conclude that plaintiffs have established the second element of res ipsa loquitur.
3. Voluntary Action by Plaintiff
The third element of res ipsa loquitur requires that the accident not be due to any voluntary action on the part of the plaintiff. The trial court concluded that plaintiffs had satisfied this element because “there is no evidence of any voluntary action on the part of the Plaintiff.” We conclude, however, that this element of res ipsa loquitur is no longer required in Arizona because of the advent of comparative negligence. See AR.S. §§ 12-2501 to 12-2509.
This court has previously observed that this element may have been abrogated by comparative negligence.
See Ward,
178 Ariz.
The third element of
res ipsa loquitur
corresponds to the common law theory of contributory negligence.
See First National Bank,
We therefore conclude that, due to the advent of comparative negligence, a plaintiff seeking to gain the benefit of
res ipsa loquitur
need not show that the accident was not caused by any voluntary action on her part. We note that this conclusion is supported by the decisions of courts in other comparative negligence jurisdictions that have addressed the issue.
See, e.g., Emerick v. Raleigh Hills Hosp.-Newport Beach,
We further note that our holding does not prevent defendants from arguing Cox’s fault to the jury; nor does it prevent the jury from considering Cox’s conduct as a factor when apportioning fault.
Cf. Dykeman,
4. Plaintiffs Inability to Discover the Defect
The fourth element of
res ipsa loquitur
requires plaintiffs to establish that they are unable to show the particular circumstances that caused the offending instrumentality to operate to Cox’s injury. “Invocation of
res ipsa loquitur
is no substitute for reasonable investigation and discovery. The doctrine may benefit a plaintiff unable directly to prove negligence; it does not relieve a plaintiff too uninquisitive to undertake available proof.”
McDonald,
In framing this issue for the trial court, defendants argued that Cox was the only person in a position to show the particular circumstances that resulted in the accident because only she could know how her jacket was caught under the handrail. Defendants reiterate this argument on appeal.
C. Plaintiffs’ Substantive Claims
Because plaintiffs have successfully invoked
res ipsa loquitur
in response to defendants’ Motion for Summary Judgment, they may proceed without evidence of either a specific defect or a dangerous condition in the escalator, or of a particular negligent act or omission on the part of defendants.
McDonald,
CONCLUSION
We reverse the trial court’s grant of summary judgment in favor of defendants and remand this ease to the trial court for proceedings consistent with this opinion.
Notes
. When reviewing summary judgment, we view the facts and all reasonable inferences from those facts in the light most favorable to the party opposing the motion.
Estate of Hernandez v. Arizona Bd. of Regents,
. A plaintiff may also use a
res ipsa loquitur
type of inference to prove the existence of a defect in a strict liability case.
Dietz v. Waller,
. This does not preclude, however, a possible further challenge by defendants to the adequacy of the fourth (now third) element of
res ipsa loquitur
if, after further discovery, plaintiffs are unable to show that they have adequately investigated the escalator, although able to do so.
See McDonald,
