This is an appeal of a products liability action. Anthony Rice brought suit against Ingersoll-Rand Company after he was injured on a mobile drill rig owned by his employer, Jackson Drilling Company, and manufactured by Ingersoll-Rand. Rice sought damages based upon negligence, breach of warranty and strict liability. Approximately two years later, Ingersoll-Rand filed a third-party complaint against Jackson Drilling Company, seeking contribution and indemnity from Jackson for any damages awardеd to Rice. Because of In-gersoll-Rand’s delay in bringing its claim, the trial court separated the two actions, reserving Ingersoll-Rand’s claim against Jackson Drilling Company to be tried independently from Rice’s claim against Inger-soll-Rand. 2
Rice was severely injured while riding the rotary head of a portable oil drilling rig manufactured and sold by Ingersoll-Rand *927 to Jackson Drilling Company in 1976. Rice was 25 years old at the time of his injury; the accident occurred less than two hours after he began his first dаy of work with Jackson Drilling Company. Rice apparently had no prior experience working around drill rigs.
The drill rig on which Rice was injured consists of a derrick which is mounted on the back of a truck. At the drilling site, the derrick is raised hydraulically to a height of approximately 37 feet. The drill head rotates, forcing a drill bit and a 25-foot length of pipe into the ground. When an entire length of pipe is in the ground, it is disconnected from the head. The rotary head is returned to the top оf the derrick, another length of pipe is attached and the process is repeated until the desired depth is reached. The drill rig is operated from a control panel located immediately to the right of the rotary head on the rear of the rig. The control panel contains a drill feed lever which controls the upward and downward travel of the rotary head, levers that control the speed of this travel and several emergency shutdown dеvices. The maximum speed of the rotary head is approximately 100 feet per minute. The derrick itself can be lowered in a few minutes under ideal conditions.
Rice was injured when he fell while riding the oil rig’s rotary head to the top of the derrick. Rice was asked to ride the drill’s rotary head by his site foreman in order to paint certain markers on the derrick which allow the drillers to determine the depth to which they have drilled. The crew on which Rice was working began drilling in the еarly evening, and there was some fear that the foreman would not see the markers in the dark. Rice climbed several feet up the derrick, straddled the rotary head, rode to the top of the derrick and, when the rotary head’s upward movement was not stopped, was crushed between the top of the head and the derrick.
At trial, the crew foreman testified that he intended to stop the head at the marker five feet from the top of the derrick but that thе drill feed control malfunctioned and he was unable to stop the drill rig’s ascent immediately. According to Rice’s brief, in the few seconds it took the crew foreman to react, Rice’s body became jammed between the upper portion of the derrick tower and the rotary head. A few seconds later, when the foreman was able to reverse the head, Rice fell to the ground. He fell 25 to 30 feet from the top of the derrick, striking a truck before he hit the ground. His injuries included severe and permanent atrophy of his left side, several fractures, a concussion and multiple internal and external injuries.
Rice’s claim was tried before a jury and a verdict was returned for Rice awarding him $86,905.92 for reasonable medical expenses, and $850,000 for the destruction of his power to earn money. The trial judge gave the workers’ compensation insurance carrier, Glens Falls Insurance Company, a lien against the first $130,195.92 paid by Ingersoll-Rand to Rice as reimbursement for workers’ compensation benefits paid to Rice during the pendency of the litigation.
At trial, Rice contended that Ingersoll-Rand knew that oil workers routinely used the head as an “elevator” to get up and down the derrick for maintenance. Rice contends that Ingersoll-Rand knew this practice existed in 1976 when the rig involved in this lawsuit was manufactured and marketed. Rice argued that, under the circumstances, Ingersoll-Rand should have plаced a warning or erected a guard against riding the rotary head, or that In-gersoll-Rand should have made efforts to insure that its safety manual, which contained a warning against using the head as an elevator, was distributed to old, as well as new, purchasers of the drill rig.
Ingersoll-Rand defended on the grounds that the drill rig was manufactured in accordance with industry standards; that no company manufacturing drill rigs at the time used a warning or guard on the head of their drills; and that there were no industry standards from any source requiring or recommending either a warning or a *928 guard. Ingersoll-Rand also argued that liability rested with Jackson Drilling Company because the rig on which Rice was injured was poorly maintained. Various parts, including the emergency shutdown button, were missing from the control panel. The throttle controls were “wired” for the highest speed, the lights designed to illuminate the derrick were missing, the machine was covered with grease, and the operator’s manual was in the cоmpany office in Tennessee rather than in the cab of the drill rig. In addition, Ingersoll-Rand contended that Jackson had not formally trained the crew foreman to operate its drill, and that the foreman had not read the operator’s manual for the rig. Finally, In-gersoll-Rand contended that Rice’s own contributory negligence in climbing on the rotary head was a bar to his recovery.
Ingersoll-Rand makes five arguments on appeal. First, Ingersoll-Rand argues that Rice’s expert witness, James Wiatt, was not qualified to express an opinion on the design of drill rigs and that, even if he was qualified, his testimony was not sufficient to submit the case to the jury. Wiatt has a degree in mechanical engineering and worked for 32 years for a manufacturer of machine tools. Wiatt observed a drill rig in operation, reviewed photos and engineering drawings of the rig and opined that Ingersoll-Rand’s rig was an “accident ready to happen.” Ingersoll-Rand contends that Wiatt was not qualified as an expert and that his testimony should have been excluded because he lacked experience in the drilling industry, had only limited experience with the product, and had no specific technical or practical familiarity with the design of the product. However, the decision as to qualification of a witness as an expert rests in the discretion of the trial court, and the trial court’s ruling is seldom reversed on appeal.
Lee v. Butler,
Ky.App.,
We do have some reservations, however, on the issue of whether Wiatt’s testimony was sufficient to go to the jury оn the issue of strict liability. Our own review of the record reveals that Wiatt testified in a very conclusory fashion that the drill rig manufactured by Ingersoll-Rand was defective and therefore unreasonably dangerous. In our opinion, Wiatt’s testimony is strikingly similar to that in
Jones v. Hutchinson Manufacturing Company,
Ky.,
Proof of nothing more than that a particular injury would not have occurred had *929 the product which caused the injury been designed differently is not sufficient to establish a breach of the manufacturer’s or seller’s duty as to the design of the product.
Next, Ingersoll-Rand argues that, but for the state of disrepair of the drill rig, Rice's accident would not have occurred. Under KRS 411.320, a manufacturer is liable only for injuries that would have occurred if the product had been used in its original, unaltered and unmodified condition. Product alteration or modification includes the failure to observe routine care and maintenance. Again, it appears to be undisputed that the drill rig on which Rice was injured was not in its original condition. Several pieces were missing from the control panel, including an emergency shutdown button, and speed control levers were wired into place for maximum speed. The machine was covered with dirt and grease, and several lights were not operating.
Rice argues that none of thеse alterations or modifications was a “substantial cause of the occurrence resulting in injury or damages” as required by KRS 411.320. We believe that Rice misreads the statute. Subsection (1), which absolves manufacturers from liability in certain circumstances, does not require that the alteration or modification be a “substantial cause” of the plaintiff’s injury. Rather, it provides for a manufacturer’s liability only for the injury that would have occurred if the product was used in its original unaltеred and unmodified condition. Only in subsections (2) and (3) does the element of “substantial cause” come into play in those instances where a plaintiff has performed an unauthorized alteration to a product or where a plaintiffs contributory negligence was a substantial cause of his injury. Rice did not modify the drill rig himself, so subsection (2) is inapplicable. We believe, however, that there is enough evidence in the record to allow reasonable minds to conclude that Ingersoll-Rand’s drill rig would have caused Rice’s injury despite the poor maintenance by Jackson Drilling Company. This is a question of fact for the jury, so a directed verdict was not warranted.
Wheeler v. Andrew Jergens Co.,
Ky. App.,
Ingersoll-Rand also argues that it was entitled to a directed verdict because the evidence established that Rice was negligent as a matter of law and therefore barred from recovering in a products liability action. KRS 411.320(3);
Reda Pump Co. A. Div. of TRW, Inc. v. Finck,
Ky.,
Ingersoll-Rand also argues that the trial court erred by failing to instruct the *930 jury on Jackson Drilling Company’s negligence; by failing to give an instruction which would have allowed the jury to apportion liability between Ingersoll-Rand and Jackson; and by allowing Glens Falls Insurance Company to recover its workers’ compensation payments from Rice’s judgment against Ingersoll-Rand. We disagree.
Given the late date at which Ingersoll-Rand filed its third-party complaint against Jackson Drilling Company, we believe the trial court correctly ordered that its claim be tried independently of Rice’s claim against Ingersoll-Rand. We believe that upon remand the same method of trial should be conducted, although there have been some significant changes in the law since the trial: one change in case law and one by statute.
Ingersoll-Rand argues that
Floyd v. Carlisle Construction Company, Inc.,
Ky.,
We are further confounded by KRS 411.182 (effective July 15, 1988) which adopts comparative negligence in products liability cases, thus overruling KRS 411.-320(3), and which statutorily overrules Reda Pump Co., supra. We also note that KRS 411.182(4) covers the workers’ compensation situation; thus, an agreement to operate under the act is a “similar agreement” within the statute. But because KRS 411.182 does not have retroactive application pursuant to KRS 446.080(3) 4 , the trial court will have to try this case the same as if the new statute did not exist.
Ingersoll-Rand will be able to present testimony regarding Jackson Drilling Company’s negligence in failing to properly maintain its machinery, failing to train its employees and failing to enforce its policy against riding thе rotary head. The fact that Ingersoll-Rand is not entitled to an instruction on Jackson Drilling Company’s duties as an employer does not negate this element of Ingersoll-Rand’s defense.
The Supreme Court stated very clearly in Burrell:
Further, as direction to the trial court, the issues in this case do not trigger the application of either KRS 454.040, which permits the jury to apportion damages where the plaintiff’s claim is against two or more tortfeasors, nor Orr v. Coleman, Ky.,455 S.W.2d 59 (1970), which permits the jury to apportion damages between a settling tоrtfeasor who is no longer a party and a non-settling tort-feasor.
Floyd
primarily relied upon
Hilen v. Hays,
Ky.,
Similarly, we disagree with In-gersoll-Rand’s argument that Glens Falls Insurance Company may be prevented from recovering workers’ compensation benefits paid to Rice because of Jackson Drilling Company’s purported negligence. KRS 342.700(1) provides for recovery of
*931
compensation paid by an employer, insurance carrier, the Special Fund or the Uninsured Employers Fund from the “person in whom legal liability for damages rests.” As we read KRS 342.700(1) and recent case law from our Supreme Court in
Mastin v. Liberal Markets,
Ky.,
Finally, Ingersoll-Rand argues that the trial judge erred in the instructions given to the jury. With this argument we agree, although for somewhat different reasons than those proffered by Ingersoll-Rand. The judge gave eight instructions to the jury. Apparently they were not the instructions offered by either Ingersoll-Rand or Rice. The judge gave three instructions addressing the liability of Ingersoll-Rand. Those instructions provided:
Instruction No. 3
The jury will find for the plaintiff, Anthony Rice, if you believe from the evidence:
(a) That the defendant, Ingersoll-Rand Company, designed, manufactured, marketed, and/or designed the Mоdel T-4 Drillmaster drilling rig in question;
(b) That the drilling rig was in a defective condition and unreasonably dangerous to the user at the time the drilling rig was manufactured;
(c) That such defect was the substantial factor in causing the injuries sustained by the plaintiff, Anthony Rice.
The phrase “defective condition and unreasonably dangerous” means that a reasonably prudent manufacturer of drill rigs fully aware of the risk would not have put the rig on the market.
Instruction No. 4
The jury is further instructed that you will find for the plaintiff, Anthony Rice, under this instruction if you believe from the evidence:
(a) That the defendant, Ingersoll-Rand Company, designed, manufactured, marketed, and/or designed the Model T-4 Drillmaster drilling rig in question;
(b) That it was the duty of the said defendant to weigh the risk of injury from the drilling rig, as designed, against its benefits, as designed, and if the risks outweighed the benefits, to redesign it in such a way that the risk of injury was minimized or eliminated; [Emphasis added.]
(c) That such defect in design, if any, was the substantial factor in causing the *932 injury sustained by the plaintiff, Anthony Rice.
Instruction No. 5
The jury will find for the plaintiff, Anthony Rice, if you believe from the evidencе:
(a) That the defendant, Ingersoll-Rand Company, designed, manufactured, marketed, and/or designed the Model T-4 Drillmaster drilling rig in question;
(b) That said defendant was to post such warning or warnings as would bring to a user’s attention fair and adequate notice of any and all dangers that the defendant could reasonably foresee that might arise from the use or misuse of the drilling rig except those that are obvious;
(c) That such failure of notice was a substantial factor in causing the injuries sustainеd by the plaintiff, Anthony Rice.
Ingersoll-Rand complains that the instructions given were unduly repetitive and focused inappropriately on the warning issue. Ingersoll-Rand’s chief complaint appears to be with Instruction No. 5. We are more troubled, however, by Instruction No. 4. Neither of the parties disputes Instruction No. 3 which sets out the doctrine of strict liability provided in Restatement (Second) of Torts § 402A, (1965).
Although we agree with Inger-soll-Rand that Instruction No. 5 was inart-fully worded, we also believe that the general legal рrinciples embodied by that instruction were appropriately given to the jury.
Post v. American Cleaning Equipment Corporation,
Ky.,
As noted above, we are more disturbed by the risk/benefit analysis provided in Instruction No. 4. This instruction apparently found its genesis in a concurring opinion in
Nichols v. Union Under
*933
wear Company, supra
at page 434. There a risk/benefit standard was suggested as a means to clarify products liability law in Kentucky. The instruction was not approved by the majority opinion in that case and we do not proffer an opinion on its appropriateness in future cases; but such an instruction was not appropriate in this case. In Kentucky “the basic function of instructions ... is to tell the jury what it must believe from the evidence in order to resolve each dispositive factual issue in favor of the party who bears the burden of proof on that issue.” J. Palmore,
Kentucky Instructions to Juries
§ 1301 (1977). There was simply no evidence before the jury in this case which would allow the jury to evaluate the risks and benefits associated with the design and manufacture of Ingersoll-Rand’s drill rig in order for them to use this instruction in any meaningful way.
West Virginia Tractor and Equipment Company v. Cain,
Ky.,
The judgment of the Lee Circuit Court is reversed and this matter is remanded for a new trial consistent with this opinion.
All concur.
Notes
. As of the date this appeal was heard, Inger-soll-Rand had not yet tried its claim against Jackson Drilling Company.
. We are not convinced that the slight variations in appearance between Ingersoll-Rand’s rotary head and those of the other drill rig manufacturers is significant enough to be relevant.
. No statute shall be construed to be retroactive unless expressly so declared.
. The use here was not a bizarre use of the drill head whereby it falls outside the bounds of foreseeability, although it was an unintended product use from the manufacturer’s point of view. For a good discussion of this point, see Sales, The Duty to Warn and Instruct for Safe Use in Strict Tort Liability, 13 St. Maty's L.J. 521, 533 (1982).
