The plaintiff, Louis J. Rodrigue, Jr., was injured while working offshore when he fell through a hole in a drilling rig owned by the defendant Dixilyn Corporation. He sues Dixilyn, urging both negligence and strict liability as theories of recovery. The jury found the hole in Dixilyn’s rig to be an unsafe and dangerous condition and, addi *539 tionally, found both plaintiff and defendant to be negligent. In accord with jury instructions which had indicated that contributory negligence on the part of the plaintiff that proximately caused his injury would relieve the defendant under both negligence and strict liability theories of liability, judgment was rendered for the defendant Dixi-lyn. On appeal, the plaintiff argues that the jury was erroneously instructed that under Louisiana law contributory negligence would be a defense to strict liability for damage occasioned by a defective thing under Civil Code Article 2317. We agree with the plaintiff’s contention, and we therefore reverse and remand.
I
The accident occurred about 1:00 a. m. on a level of Dixilyn’s drilling rig that the day before had been transferred to a drilling platform owned by another company (Placid). The plaintiff Rodrigue, an employee of the owner (McDermott) of a drilling crane assisting in the operation, fell though a small (3' X 4') unguarded hole cut out in the walkway grating around the large center hole used for the drilling pipe. 1 He suffered injuries when he fell to the floor of the next level. Rodrigue, who had come on duty at 10:30 p. m., had not previously had the opportunity to observe the area. That the opening through the floor was unusual and not-to-be-expected is partially corroborated by the circumstance that, immediately after Rodrigue fell through it, a co-worker also fell into it while using the walkway. (Fortunately, the latter caught the edges of the hole and was able to avoid falling to the deck below.) The jury finding that the open hatch or hole created a dangerous condition is clearly supported by the evidence.
At the time of the accident, the floor was in darkened or (as the district court’s questioning educed) semi-lighted condition. Dixilyn’s primary defense as to any strict liability for damages resulting from Ro-drigue’s fall is that Rodrigue was contribu-torily negligent in proceeding to work in an area that was not illuminated.
Evidence in the record may support the jury finding that Rodrigue himself was contributorily negligent (and thus barred from recovery) — e. g., he proceeded on the walkway despite the lack of illumination, or with possibly insufficient care under the circumstances of inadequate illumination. Thus, if contributory negligence 2 were a bar to recovery, we might be required to affirm the denial of recovery. On the other hand, if instead only Rodrigue’s assumption of the risk 3 will defeat his recovery, Rodrigue should have recovered under the findings of the jury, since the facts reflected by the record do not show any basis for Rodrigue’s subjective knowledge of or appreciation of the risk so as to constitute his assumption of it. As summarized by Louisiana’s Professor Crowe: “The essence of assumption of the risk is twofold: first, knowledge and appreciation of a danger, and second, a voluntary encountering of it. *540 The essence of contributory negligence is simply carelessness.” Crowe, The Anatomy of a Tort, 22 Loyola (La.) L.Rev. 903, 915 (1976). See also F. Stone, 12 Louisiana Civil Law Treatise: Tort Doctrine, Section 51 (1977).
II
The trial judge instructed the jury that an owner-custodian of a thing may be held liable for damage caused by a defect in the thing, despite the absence of negligence or intent. According to the judge, “[t]he liability arises from [the custodian’s] legal relationship to the object, whose defect created an unreasonable risk of injury to others.” Upon concluding his instructions on possible bases of liability, the judge broached the subject of defenses: “If you find that Dixi-lyn was either negligent in the breach of its duty or at fault as the custodian of the rig, . it is necessary for you to consider the defense of Dixilyn that the plaintiff himself was guilty of contributory negligence. ... In a case of this kind proof by the defendant by a preponderance of the evidence of any negligence on the part of the plaintiff which was a proximate cause of the accident bars the plaintiff’s recovery as a matter of law, even though the defendant may also be found to have been negligent or at fault as the custodian of the rig in question.” (Emphasis added.)
The plaintiff did not object to these instructions at trial, but he now claims that they are incorrect statements of the Louisiana law insofar as they indicate that contributory negligence would exonerate a defendant from strict liability for damage caused by a defect of a thing for which he was responsible. The plaintiff asks the court to apply the plain error doctrine to permit him to hurdle the Rule 51 barrier to such belated objection to the instructions.
On several occasions this court has reversed on the basis of erroneous jury instructions that without objection had been given at trial.
Jamison Co., Inc. v. Westvaco Corp.,
The doctrine is not a routine by-pass to Rule 51, however. The criterion for application of this doctrine is “certainly not whether [this] court approves or does not disapprove the results of the case.”
Sheppard Federal Credit Union v. Palmer,
*541 To merit reversal on this point, therefore, the plaintiff must establish that the instruction was an incorrect statement of law and that it was probably responsible for an incorrect verdict, leading to substantial injustice. Under the pre-comparative negligence Louisiana law, 6 a jury finding of contributory negligence in a tort suit precludes any recovery on the part of the plaintiff. Furthermore, the alleged contributory negligence of this plaintiff appears to be the only defense to strict liability under Article 2317 available in light of the answers of the jury to the individual interrogatories in this case. 7 Thus, if the trial judge incorrectly stated the applicability of contributory negligence as a defense to Article 2317 strict liability, the instruction led to an incorrect verdict and the substantial injustice of no recovery to the injured plaintiff despite his clear entitlement to same. 8
Ill
Article 2317 of the Louisiana Civil Code provides: “We are responsible, not only for the damage occasioned by our own act, but for that which is caused by . things which we have in our custody . . .” In 1975, reversing prior jurisprudence to the contrary, the Louisiana Supreme Court held that this article created strict liability for damage caused by defects in a thing.
Loescher v. Parr,
*542
In recognizing the Article 2317 strict liability rule, the court also noted the available defenses, which are likewise applicable to other strict liability causes of action — liability may be avoided only by proof that the damage was caused by (a) the fault of the victim, (b) the fault of a third person, or (c) an irresistible force.
The fault of a “third person” which exonerates a person from his own obligation importing strict liability as imposed by Articles 2317, 2321, and 2322 is that which is the sole cause of the damage, of the nature of an irresistible and unforeseeable occurrence — i. e., where the damage resulting has no causal relationship whatsoever to the fault of the owner in failing to keep his building in repair .
In
Loescher
and
Olsen
the Louisiana court did not have occasion to address the issue of the third defense to strict liability under the Civil Code — i. e., the fault of the victim (here at issue). However, to be consistent with the stated criteria of the other two defenses, the victim’s fault should be in the nature of an independent and superseding cause of his damages not imputable to the defendant, in order to absolve a defendant of its responsibility for damages caused by the defect of a thing for which he is strictly liable. (Here, the very basis of the defendant’s strict liability was the unreasonable danger created to the unsuspecting or even careless passerby who might fall through the unguarded and not-to-be-expected hole in the walkway.) Moreover, authoritative guidance is provided by a decision clarifying the defense of victim fault to strict liability provided by another article of the Louisiana Civil Code. In
Langlois v. Allied Chemical Corp., Inc.,
The defense of contributory negligence which is urged here presupposes original negligence on the part of the defendant. This case is not a case where negligence is an ingredient of fault, and contributory negligence is not a defense. Usually, the assumption of risk doctrine will apply where the nature of the relationship of the parties appears to exact consent from the one injured to be exposed to possible harm. In such situations the plaintiff understands the risk involved and accepts the risk as well as the inherent possibility of damage because of the risk. There is some authority for rejecting assumption of risk in cases which do not involve negligence, but the majority view is that assumption of risk is a defense to strict liability. A plaintiff who with full knowledge and appreciation of the danger voluntarily exposes himself to the risks and embraces the danger cannot recover damages for injury which may occur.249 So.2d at 140 .
As stated by Professor Ferdinand Stone in his authoritative treatise, 12 Louisiana Civil Law Treatise: Tort Doctrine, Section 439, p. 566:
“Where the theory upon which recovery is sought is one of strict liability, either under a tort notion of implied warranty or of legal fault based on public policy, contributory negligence is not a defense, while voluntary assumption of a known risk (fault of the victim) act of a stranger and force majeure may be.”
See also Andrus,
Strict Liability Under Civil Code Articles 2317, 2318, 2321, 25
La.B.J. 105, 117-19 (1977); Comment, Fault of the
*543
Victim: The Limits of Liability Under Civil Code Articles 2317, 2318, and 2321, 38 La.L. Rev. 995 (1978). As we ourselves have noted, citing
Langlois
and reversing a district court for giving instructions that contributory negligence was a defense, a defendant is not exculpated by the plaintiff victim’s contributory negligence from the defendant’s similar strict liability for harm caused by product defect.
Khoder v. Amf, Inc.,
The defendants refer us to language in several intermediate appellate court decisions, some of which seem to have recognized contributory negligence as a defense in Article 2317, 2318 or 2321 strict liability cases, and some of which recognize only assumption of the risk. For the most part, the former decisions are distinguishable or not squarely in point, 10 but to the extent that they imply that ordinary carelessness or inadvertence of a plaintiff may exoner *544 ate a strict liability defendant, they seem to be inconsistent with the law clearly pronounced by the State Supreme Court in Langlois and Loescher.
In summary, as Professor Stone correctly concludes, contributory negligence as an affirmative defense is “properly pleaded only to an action based on negligence.” Stone, supra, § 56, p. 76. See also Id. § 50, p. 71.
The rule that a strict liability action is not barred by the conduct of the plaintiff which amounts to no more than ordinary contributory negligence (lack of due care) is generally established in other American jurisdictions as well. Restatement (2d) of Torts, §§ 402A (Comment n), 523 (1965); W. Prosser, Law of Torts, §§ 79, 103, pp. 522, 670-71 (4th ed. 1971); 2 F. Harper & F. James, The Law of Torts § 22.7, p. 1216 (1956);
It is apparent from the jury’s answers to its interrogatories, 12 read in the light of the trial judge’s instructions, that the defendant Dixilyn is liable under Civil Code Article 2317 for the injuries to the plaintiff Rodrigue occasioned by its defective drilling rig. The evidence supported at most only the plaintiff’s ordinary contributory negligence, i. e., inadvertence in failing to discover or protect himself against the possibility of the defect, conduct that will not relieve the defendant of liability. Accordingly, we reverse and remand for trial to assess damages.
REVERSED AND REMANDED.
Notes
. In the discovery depositions it is indicated that the hole in the walkway had been cut for purposes of installing a stairway to the level below. However, when the plaintiff fell through the hole, no stairway had been installed, and there was no hatch or warning to protect pedestrians from the risk of not noticing it and falling through.
. See
Smolinski v. Taulli,
Contributory negligence is conduct on the part of the plaintiff which falls below the standard to which he should conform for his own protection. . . . The standard of conduct to which the plaintiff must conform for his own protection is that of a reasonable man under the circumstances.
. See
Prestenbach v. Sentry Insurance Co.,
In order for a plaintiff to assume a risk, he must knowingly and voluntarily encounter the risk which causes his injury. . . . “Knowledge” is the mainstay of this defense, and it must be proved by a preponderance of the evidence. .
[F]or purposes of a knowing assumption of risk, we impute knowledge to a plaintiff, not because he was in a position to make certain observations, but only when he actually makes those observations and, from them, should reasonably have known that a risk was involved.
. Federal Rule of Civil Procedure 51 provides: At the close of the evidence or at such earlier time during the trial as the court reasonably directs, any party may file written requests that the court instruct the jury on the law as set forth in the requests. The court shall inform counsel of its proposed action upon the requests prior to their arguments to the jury, but the court shall instruct the jury after the arguments are completed. No party may assign as error the giving or failure to give an instruction unless he objects thereto before the jury retires to consider its verdict, stating distinctly the matter to which he objects and the grounds of his objection. Opportunity shall be given to make the objection out of the hearing of the jury.
. The plain error rule may apply in such circumstances, even if an instruction requested by the now-complaining party (but not given) shared the same mistaken legal assumption.
Wirtz v. International Harvester Company,
. Subsequent to the accident here sued upon, the 1979 Louisiana Legislature enacted in Act 431 a pure form of comparative negligence to govern those cases in which “contributory negligence is applicable to a claim for damages.” Civil Code Article 2323, as amended in 1979 La. Acts No. 431, effective August 1, 1980. See generally, Symposium: Comparative Negligence in Louisiana, 40 La.L.Rev. 289 (1980).
. The jury found in answer to interrogatories numbers one through four, that the plaintiff fell through an open hatch or hole, other than the drill hole, in the skid mat of Dixilyn’s rig. It found that this hole created an unsafe or dangerous condition on the rig and that such condition was not created by anyone else. The judge’s instruction equated an unsafe condition with the defect required for liability under Civil Code Article 2317. See Part III of opinion, infra.
. In a Third Circuit FELA case in which no evidence of contributory negligence had been presented, the court stated: “[I]n rare instances, where fundamental error occasions a miscarriage of justice, this court will notice such error despite counsel’s failure to comply with Rule 51. . . . Allowing the jury to speculate on contributory negligence and thereby possibly to diminish the compensation recoverable, under the circumstances of this case, was a miscarriage of justice.” Paluch v. Erie Lack-awanna Railroad Company, 387 F.2d 996, 1000 (3rd Cir. 1965).
. The basis of negligence liability is conduct that creates an unreasonable risk of injury to others, Restatement (2d) of Torts, Section 282 (1965), but (unlike in cases imposing strict liability) to be liable the defendant must have known or should have known of the unreasonable risk thus created.
Id.,
Sections 284, 289-91. Thus, although the creation or maintenance of an unreasonable risk of injury to others is a central basis for liability under either negligence or strict responsibility, in strict liability (unlike in negligence-based actions) the defendant may be liable for damages caused by vices or defects in things for which responsible under the Louisiana Civil Code, whether or not he knew or should have known of the unreasonable risk of injury he thus created or maintained.
Loescher v. Parr, supra; Holland v. Buckley,
. The defendant cites the following intermediate appellate court decisions as support for its argument that contributory negligence is the victim fault relieving the defendant from liability under Article 2317:
Daniel v. Cambridge
Mut.
Fire Ins. Co.,
We do not consider these decisions to be convincing authority for that position and in fact note that several of them are not apposite to the case at hand. In
Daniel
for instance the victim fault found by the court was assumption of risk, not contributory negligence.
Brooks
ruled for the defendant with respect to injuries caused by defendant’s calf because the plaintiff was the custodian of the calf at the time of injury. The
Alfonso
court relieved the defendant of liability because a person who “voluntarily utilizes [recreational] facilities assumes the reasonably foreseeable risks which are inherent in the use thereof.”
Perhaps the strongest attempt to justify the application of contributory negligence as victim fault (though in an Article 2321 animal liability case) is made in
Parker.
The facts of this case are closely analogous to those in the two First Circuit opinions,
Dotson v. Continental Insurance Co.,
We also recognize that some Law Review commentators are of the opinion that contributory negligence constitutes victim fault for purposes of a strict liability action. See, e. g., The Work of the Louisiana Appellate Courts for the 1974-75 term —Torts, 36 La.L.Rev. 400, 401 (1976); Comment, Does Louisiana Really Have Strict Liability Under Civil Code Articles 2317, 2318 and 23217, 40 La.R.Rev. 209, 210 (1979). To some extent this mistaken impression seems to flow from court language tying the strict liability to unreasonable risk of harm caused by the child, animal or thing for whom or which the defendant is responsible. The use of language that coincides with negligence terminology does not alter the nature of strict liability for damages caused by defects in things for which under the Civil Code the owner or custodian is responsible. See note 9, supra.
We also note that Louisiana has retreated from a full application of contributory negligence even with respect to negligence liability in certain circumstances.
See, e. g., Boyer v. Johnson,
. The increasingly widespread abrogation of the total bar of contributory negligence in favor of the mitigation of comparative negligence has resulted in some re-thinking of the traditional rule that contributory negligence does not affect the strict liability plaintiffs recovery. A trend toward allowing such conduct to reduce recovery is developing.
See, e. g., West v. Caterpillar Tractor Co.,
. See footnote 7 supra.
