Thе principal issue in this appeal is whether the Federal Employers’ Liability Act (FELA), 45 U.S.C. §§ 51-60 (1982), authorizes a railroad employee who has sustained physical and emotional distress injuries in a railroad collision, to recover damages for the aggravation of those injuries resulting from his subsequent, allegedly wrongful discharge. We conclude that it does not. Winston Lewy, a Southern Pacific Transportation Company employee, was injured in a collision in'the company’s Los Angeles switching yard, and subsequently was discharged by Southern Pacific for other reasons. Lewy brought an FELA action against Southern Pacific to recover for the injuries he sustained in the collision and for the aggravation of those injuries resulting from his discharge. He appeals a jury award of $15,000.
Lewy challenges the trial court’s exclusion of all evidence relating to his discharge by Southern Pacific. He also claims that the trial court erroneously excluded evidence concerning the bias of one of Southern Pacific’s witnesses and claims that its jury instructions were repetitive and slanted against him. We have jurisdiction under 28 U.S.C. § 1291 (1982). We conclude that thе Railway Labor Act (RLA), 45 U.S.C. §§ 151-188 (1982), precludes courts from awarding the type of discharge-related damages sought by Lewy, and find his other challenges to be without merit. We therefore affirm.
FACTUAL BACKGROUND
Lewy was injured in March, 1980 when a locomotive he was operating was struck from the rear by a locomotive operated by another Southern Pacific employee. Following the collision, he experienced pain in his head, neck, lower back, and right leg, and was hospitalized for eight days. His back condition appeared to deteriorate over the next year, and he underwent a lumbar laminectomy to remove a portion of his spinal disc tissue in April, 1981. Lewy was hospitalized for two weeks following the surgery. His total medical bills resulting from the accident were $12,665.37.
In August, 1980, when Lewy was convalescing from his original injury, Southern Pacific began to suspect that he was malingering, and ordered him to undergo a physical examination with a company phy *1284 sician. Lewy refused, and Southern Pacific charged him with insubordination and misrepresenting his physical condition, convened a disciplinary hearing, and discharged him in October, 1980. Lewy appealed his dismissal to the National Railroad Adjustment Board (NRAB). In December, 1981, the NRAB ruled that Southern Pacific had introduced irrelevant evidence at Lewy’s disciplinary hearing, and had improperly refused to permit two of his treating physicians to testify. The NRAB ordered Lewy to be reinstated based on these procedural errors, expressly noting that it was not ruling on the merits of his claim:
[Irrespective of what we might think of the merits or of the Claimant’s [Lewy’s] testimony, we do not pass thereon. Claimant will be reinstated to service with all rights unimpaired, but without pay for time lost as Claimant has yet to be discharged from [his current treating physician’s] care.
Lewy’s physician gave him permission to return to work in February 1982, but advised that he should avoid prolonged sitting. As a result, Lewy was prevented from returning to his former position as an engineer, and was limited instead to yard service, a lower-paying job. Before returning to work, however, Lewy was required to pass Southern Pacific’s standard rules examination, and he failed it a number of times. He returned to work in September, 1982.
At trial, Southern Pacific introduced evidence that the collision in which Lewy was injured was not very severe, that Lewy had a history of back problems prior to the collision, and that Lewy may have been malingering. The engineer operating the other locomotive in the collision testified that the two trains “didn’t hit that hard,” and that the collision “was just like coupling into a car.” Moreover, Southern Pacific elicited testimony that Lewy had injured his back in a 1964 automobile accident, and that that injury left him unable to play tennis, which he had regularly done up to that time, and resulted in his being excused from military service. Lewy attempted in his testimony to minimize the severity of his prior back injury, but he was impeached based upon answers to interrogatories he had provided in his personal injury action arising out of the 1964 accident. His sister, Jere Brown, testified that he had consulted her following the 1964 accident concerning whether he should have back surgery, and had specifically told her that he no longer played tennis and could not serve in the military because of his injury. Furthermore, two of Lewy’s treating physicians testified tlrat they doubted his veracity concerning his description of his physical condition and susрected him of malingering.
Lewy sought $117,400 in lost wages and benefits, $236,400 in lost future wages and benefits, and $12,665.37 in medical expenses he had incurred. The jury deliberated for two hours, found for Lewy, but awarded him only $15,000. Lewy contends that the jury’s low verdict was attributable to three errors by the trial court: (1) its exclusion of evidence relating to his discharge; (2) its exclusion of evidence demonstrating his sister’s bias against him; and (3) its slanted jury instructions, which, he claims, overemphasized the possibility that he was contributorily negligent for the collision.
A. Exclusion of Evidence Relating to Lewy’s Discharge
At trial, Lewy testified that following his accident, he developed a fear and anxiety that he would be unable to work and would remain unemployed. He sought to introduce testimony that his “wrongful discharge” by Southern Pacific aggravated this anxiety and emotional anguish, and claimed he was entitled to recover damages for this aggravation of his preexisting emotional condition, based upon the Second Circuit’s decision in
Sharkey v. Penn Central Transportation Co.,
The original district judge in this action denied Southern Pacific’s motion, and ruled, based upon Sharkey, that although the NRAB had “exclusive jurisdiction” to “determine whether [Lewy’s] discharge was proper,” it had already determined that Lewy was wrongfully discharged, albeit for purely procedural reasons. The judge concluded, therefore, that Lewy was entitled to recover damages under the FELA “for aggravation of [his preexisting emotional] condition due to [the] improper discharge.”
A different judge presided at trial. Although he felt compelled to follow this pretrial ruling, he expressed serious doubts about applying Sharkey’s principles in Lewy’s action. The trial judge noted the extremely complex, almost metaphysical proximate-cause analysis that the jury would be required to undertake under Sharkey: they would be required, in effect, to distinguish between the “new” emotional distress caused exclusively by Lewy’s discharge, for which they could not award damages, and the “aggravation” of Lewy’s preexisting emotional distress and anxiety, for which they could award damages. Moreover, the trial judge noted that under Sharkey, before awarding any discharge-related damages, the jury would also be required to determine whether or not Lewy had “caused” his own discharge by refusing to see Southern Pacific’s company physician.
The trial judge ultimately determined that allowing Lewy to advance his aggravation theory would result in “undue delay” and a “confusion of the issues.” He therefore excluded evidence relating to Lewy’s discharge under Federal Rule of Evidence 403, and ruled that Lewy could present evidence relating to his emotional distress “attributable only to the accident” itself, Lewy challenges this ruling as an abuse of discretion. 1
B. Exclusion of Evidence Relating to Jere Brown’s Bias
Jere Brown’s testimony concerning the severity of Lewy’s 1964 back injury was damaging to Lewy’s case. Lewy attempted to impeach Brown by demonstrating that she was biased against him, because he had had her removed as executrix of their father’s estate in 1977, supposedly for embezzlement. Lewy’s counsel cross-examined Brown extensively about her removal as executrix and the еmbezzlement charges against her, and even raised the possibility that Brown had contacted Southern Pacific herself and volunteered to testify against Lewy. Lewy testified that there was “bad blood” between him and his sister, that she was “removed as executrix” of their father’s estate “because of her inability to handle th[e] estate,” and that he was “put in as executor, to investigate her dealings,” which “caused a flare-up in [their] relationship.”
The trial judge excluded certain testimony under Rule 403 on the “side issue[s]” of whether Brown actually embezzled funds from the estate and whether her share of the estate was ultimately withheld from her. Lewy maintains that the exclusion of this evidence prevented him from effectively establishing Brown’s bias and lack of credibility, and therefore constituted an abuse of discretion.
C. The Trial Court’s Jury Instructions
In its jury instructions, the trial court explained the principles of negligence, causation, and contributory negligence, and in- *1286 eluded one final instruction defining causation:
An injury is caused by an act or omission whenever it appears that the act or omission played any part, no matter how small, in actually bringing about or causing that injury. So if you find from the evidenсe that any negligence on the part of any party contributed in any way or manner toward any claimed injury or damages, you will find that injury was caused by such act or omission.
Lewy objected to this instruction at trial, and now challenges it on appeal, claiming that it was repetitive and that because it directly followed an instruction on contributory negligence, 2 it “unduly emphasize[d]” Southern Pacific’s contention that he was contributorily negligent and that any judgment in his favor should consequently be reduced. Nevertheless, as can be seen, the instruction does not contain the words “plaintiff” or “Lewy,” but instead refers merely to the negligence of “any party.”
ANALYSIS
We conclude as a threshold matter that the RLA precludes courts from awarding the type of discharge-related damages sought by Lewy in FELA actions. As a result, the evidence relating to Lewy’s discharge that he sought to introduce at trial was not relevant to his FELA claims, and should have been excluded under Federal Rule of Evidence 402.
See
Fed.R.Evid. 402 (“[e]vidence which is not relevant is not admissible”). Since we may affirm the trial court’s decision on any ground supported by the reсord,
3
Lofton v. Heckler,
A. Standard of Review
We examine de novo any questions relating to the district court’s subject-matter jurisdiction under the FELA, or relating to statutory interpretation of the FELA and RLA.
See Davy v. SEC,
We review the trial court’s rulings under Federal Rule of Evidence 403 for abuse of discretion.
See Maddox v. City of Los Angeles,
B. Exclusion of Evidence Relating to Lewy’s Discharge
In reviewing the trial court’s decision to exclude Lewy’s evidence relating to his discharge, we must examine the relative scope and purposes of the FELA and RLA, and must determine the extent to which the FELA authorizes parties to recover damages for discharge-related injuries, and the extent to which the RLA precludes courts from addressing such claims. The parties do not dispute that Lewy was entitled to recover damages under the FELA for the emotional distress and anxiety he suffered as a direct result of the March, 1980 collision.
See generally Taylor v. Burlington Northern Railroad Co.,
1. Scope of the FELA’s Coverage
The FELA was originally enacted by Congress in 1906 in order to “create[ ] a tort remedy for railroad workers injured on the job.”
Lancaster v. Norfolk and Western Railway Co.,
restriction[s] as to the kinds of employees covered, the degree of negligence required, or the particular sorts of harms inflicted, would be contradictory to the wording, the remedial and humanitarian purpose, and the constant and established course of liberal construction of the Act followed by this Court.
Urie v. Thompson,
Section 1 of the FELA, 45 U.S.C. § 51, which is the act’s main liability provision, provides that “[e]very common carrier by railroad ... shall be liable in damages to [employees] ... for such injury or death resulting in whole or in part from the negligence of any of the officers, agents, or employees of such carrier.” Because of its broad intended scope and somewhаt open-ended wording,
see Urie,
Yet regardless of how broadly courts have interpreted the scope of the FELA
*1289
section 1, they have, with one exception,
7
authorized the award of damages under the provision only for injuries sustained by workers “on the job” and in the general course of their work-related duties.
See, eg., Taylor, 787
F.2d at 1313-16;
Buell, 771
F.2d at 1321-24;
Lancaster, 778
F.2d at 812-16;
Yawn,
2. Scope of the RLA’s Coverage
Congress enacted the RLA in 1926 in order to promote stability in the railroad industry and to provide for prompt and efficient resolution of labor-management disputes arising оut of railroad collective bargaining agreements.
See Union Pacific Railroad Co. v. Sheehan,
In enacting [the RLA], Congress endeavored to promote stability in labor-management relations in this important national industry by providing effective and efficient remedies for the resolution of railroad-employee disputes arising out of the interpretation of collective-bargaining agreements. The NRAB was created as a tribunal consisting of workers and management to secure the prompt, orderly and final settlement of grievances that arise daily between employees and carriers regarding rates of pay, rules and working conditions. Congress considered it essential to keep these so-called “minor” disputes within the NRAB and out of the courts.
Sheehan,
Thus, RLA section 3 First (i), 45 U.S.C. § 153 First (i), provides that all “disputes between [railroad] employees and ... carriers growing out of grievances or out of the interрretation or application of agreements concerning rates of pay, rules, or working conditions” — so-called “minor disputes”— cannot be litigated in court, but must instead be referred to the NRAB for compulsory arbitration. 45 U.S.C. § 153 First (i);
see Crasos,
*1289 [I]n at least some situations the Act makes the federal administrative remedy exclusive, rather than merely requiring exhaustion of remedies in one forum before resorting to another. A party who has litigated an issue before the Adjustment Board on the merits may not reliti-gate that issue in an independent judicial proceeding. He is limited to the judicial review of the Board’s proceedings that the Act itself provides. In such a case the proceedings afforded by 45 U.S.C. § 153 First (i), will be the only remedy available to the aggrieved party.
*1290 Judicial review of Adjustment Board orders is limited to three specific grounds: (1) failure of the Adjustment Board to comply with the requirements of the Railway Labor Act; (2) failure of the Adjustment Board to conform, or confine, itself to matters within the scope of its jurisdiction; and (3) fraud or corruption.
Sheehan,
Based on the RLA’s structure and legislative history, our court and others have ruled that the grievance and arbitral mechanisms the act establishes are essentially the exclusive means for railroad employees to assert “ ‘minor’ breaches of collective bargaining contracts
...of which the firing of an individual worker allegedly for cause is a classic illustration.” Graf,
involving rights under the collective bargaining agreement ... are routinely held to be within the exclusive jurisdiction of the arbitral authority created by the [RLA].”),
cert. denied,
— U.S. -,
For the same reasons, courts have permitted employees to litigate federal law claims relating to discharges or terms of employment, and thus to circumvent the RLA’s grievance and arbitral procedures, only when their claims are
“premised on a specific federal statutory section,” Jackson,
Thus, courts have permitted actions by railroad employees challenging discharges or employment conditions when such challenges have been explicitly authorized by the Universal Military Training and Service Act, 50 U.S.C.App. § 459(d) (repealed 1974),
see McKinney v. Missouri-Kansas-Texas Railroad Co.,
However, courts have not permitted railroad employees to litigate federal claims based on discharges or employment conditions in cases where they allege “only a violation of the
policy underlying a federal statute,"
as opposed to a violation of the express terms of the statute itself,
Jackson,
3. The Relationship of the FELA and RLA to Lewy’s Discharge-Related Claims
Thus, in the present action, for Lewy to assert his discharge-related claims in court under the FELA and avoid the preclusive effect of the RLA, his claims must be based upon a specific provision of the FELA, and Congress must have intended that such claims be litigated in FELA actions.
See Gonzalez,
First, no provision of the FELA directly supports Lewy’s claims for wrongful discharge or for emotional distress damages resulting from his discharge. In determining whether particular FELA provisions authorize employees to bring discharge-re
*1293
lated claims despite the preclusive effect of the RLA, our court and others have carefully scrutinized the language of those provisions and their legislative history. Only in the case of FELA section 10, 45 U.S.C. § 60, has any court found explicit authorization for employees to challenge allegedly wrongful discharges.
See Gonzalez,
FELA section 10 provides that “[a]ny contract, rule, regulation, or device whatsoever, the purpose, intent, or effect of which [is] to prevent employees of any common carrier from furnishing voluntarily information to a person in interest as to the facts incident to the injury or death of any employee, shall be void.” 45 U.S.C. § 60. The Fifth Circuit has ruled that although this provision does not explicitly establish a cause of action for railroad employees who are wrongfully discharged or disciplined, it provides federal statutory authority sufficient to overcome the preclusive effect of the RLA, and authorizes courts to enjoin ongoing disciplinary proceedings, order reinstatement, and award back pay to employees who have been discharged or disciplined in retaliation for furnishing information to potential FELA plaintiffs or other similarly “interested” persons.
See Gonzalez,
Moreover, section 10 applies only to railroad employees discharged or disciplined
tor furnishing information to others;
it does not encompass employees who are discharged or disciplined because
they themselves initiate FELA actions. See Jackson,
Except for section 10, no other FELA provision has been held to provide federal statutory authorization for railroad employees seeking to litigate wrongful discharge claims in court. In
Bay v. Western Pacific Railroad,
The only remaining FELA provision that could possibly provide statutory authority for Lewy’s discharge-related claims is section 1 itself.
See
45 U.S.C. § 51; 45 U.S.C. §§ 52-60. As we have previously noted, although courts have often interpreted this provision broadly, only one court — the Second Circuit in the
Sharkey
decision — has ever ruled that section 1 covers discharge- or employment-related claims.
See
Analysis, Section B-l,
supra; Sharkey,
We conclude that in light of section l’s language and courts’ prior interpretations of the provision, section 1 does not provide a basis for Lewy’s discharge-related claims. To the extent that Lewy claims he was discharged in retaliation for initiating his FELA action against Southern Pacific, we agree with the Sixth, Seventh, and Eighth Circuits that such a claim is not actionable under section 1.
See id.
at 1050-51;
accord Minehart,
To the extent that Lewy claims that section 1 entitles him to recover damages for the aggravation of his preexisting injuries caused by his discharge, merely because his original injuries are compensable under that provision,
see generally Sharkey,
Moreover, Lewy’s discharge-related claims do not satisfy the second requirement necessary to avoid the preclusive effect of the RLA: that those claims vindicate rights which Congress intended to be judicially enforced through FELA actions, rather than enforced through the RLA’s grievance and arbitral procedures.
See Gonzalez,
If employees like Lewy are permitted to assert wrongful discharge claims under the FELA, they will be entitled to bring actions based on such claims in state or federal court, 45 U.S.C. § 56, and the actions they initiate in state court will not be removable to federal court. 28 U.S.C. § 1445(a) (1982);
see Lancaster,
Furthermore, permitting wrongful discharge claims to be litigated in courts under the FELA will undermine the integrity and independence of the NRAB in resolving such claims. Even in cases like the present one, where the NRAB reviewed Lewy’s wrongful discharge claim and ordered him to be reinstated prior to any court litigation under the FELA, allowing courts to supplement the remedies ordered by the NRAB will nеcessarily infringe upon its decision-making authority and its ability to effect binding resolutions of “minor” disputes. The Supreme Court has indicated that in enacting the RLA, Congress “created [the NRAB] as a tribunal consisting of workers and management to secure the prompt, orderly and
final
settlement of grievances that arise daily between
*1296
employees and carriers,” and the Court has noted that the
NRAB’s “effectiveness ... in fulfilling its task depends on the finality of its determinations. ” Sheehan,
In Lewy’s case, for example, the NRAB ordered him reinstated based purely upon procedural grounds, and did not reach the merits of his wrongful discharge claims; it thus achieved an equilibrium in Lewy’s case without interpreting the collective bargaining agreement or determining which party was at fault as to his discharge. However, if Lewy is permitted to litigate his discharge-related claims under the FELA, the NRAB’s resolution of these claims will not have concluded the dispute — the trial court will still be required to determine the lawfulness of his discharge. We find it unlikely that Congress intended such а result, given its desire that in most cases, the NRAB should provide a final, and hopefully peaceful, resolution of “minor” disputes.
See Sheehan,
Finally, to the extent that Lewy claims only that employees like himself, who sustain physical and emotional injuries com-pensable under the FELA, can also recover FELA damages for the aggravation of those injuries caused by wrongful discharges, we conclude that such a result would not be consistent with Congress’s intent in enacting the FELA and RLA. There is no coherent basis for singling out the discharges of these employees and treating them differently from all other discharges under the RLA, simply because of the fortuity that the discharged employees were also injured in “accidents” covered by the FELA. We conclude that in a case like Lewy’s, the underlying purposes and principles of both the FELA and the RLA will be accommodated if Lewy is fully compensated under the FELA for the damages directly flowing from the March, 1980 collision, and yet limited to the RLA’s procedures and remedies for his claims arising directly out of his October, 1980 discharge.
For all these reasons, we conclude that Congress did not intend for railroad employees like Lewy to assert discharge-related claims in the courts under the FELA. We conclude that the RLA precludes employees from litigating such claims in the courts and requires them to raise these claims exclusively through its grievance and arbitral procedures.
Nor are we persuaded otherwise by the Second Circuit’s 1974 decision in
Sharkey v. Penn Central Transportation Co.,
The Sеcond Circuit noted that the doctrines of proximate and intervening cause apply under the FELA, and that under these doctrines, negligent actors can be held liable for “certain kinds of aggravation of the injuries” they cause, as long as the events producing the aggravation are “reasonably foreseeable.”
9
Id.
at 690-91;
see
Prosser & Keeton,
The Law of Torts
*1297
§ 44, at 301-19 (1984). As the court pointed out, these “foreseeable” causes of aggravation could presumably include acts committed intentionally by a defendant railroad itself, such as a discharge.
See Shar-key,
However, in its analysis in
Sharkey,
the Second Circuit appears not to have considered the preclusive effect of the RLA, the fact that Congress intended most railroad labor disputes to be resolved outside the courts, or the possibility that Congress may not have intended the FELA to supplement the RLA’s remedies of back pay and reinstatement. Although, as noted above, virtually every other court to have considered the issue has concluded that federal law claims relating to discharges of railroad employees can be litigated in court only if they are based upon “a specific federal statutory section,”
Jackson,
For all these reasons, we reject the Second Circuit’s conclusion in Sharkey. We conclude that the RLA precludes Lewy from raising claims relating to his discharge under the FELA.
Because Lewy’s discharge-related claims are not cognizable under the FELA, the trial court should have excluded all evidence relating to his discharge on the ground that it was irrelevant under Federal Rule of Evidence 402.
See
Fed.R.Evid. 402. We therefore affirm the trial court’s decision to exclude that evidence.
See Lof-ton,
C. Exclusion of Evidence Relating to Jere Brown’s Bias
Lewy’s remaining claims are meritless. He contends that the trial court abused its discretion when it limited his testimony concerning Jere Brown’s bias against him and his cross-examination of Brown, based upon Federal Rule of Evidence 403. Lewy maintains that the exclusion of this evi *1298 dence effectively prevented him from establishing Brown’s bias and her lack of credibility.
We reject Lewy’s contention. The Supreme Court has indicated that “[p]roof of [a witness’s] bias is almost always relevant [under Federal Rule 401, and therefore admissible under Federal Rule 402,] because the jury, as finder of fact and weigher of credibility, has historically been entitled to assess all evidence which might bear on the accuracy and truth of a witness’ testimony”; moreover, a “showing of bias ... would have a tendency to make the facts to which [the witness] testified less probable in the eyes of the jury than [they] would be without such testimony.”
11
United States v. Abel,
However, the Supreme Court and our court have held that while parties are usually entitled to introduce some evidence of witnesses’ biases, courts have “wide discretion” under Rule 403 to impose limits on the quantity and type of evidence that they introduce.
Abel,
In the present action, the trial court permitted Lewy to introduce testimony that there was “bad blood” between him and Brown, and that her removal as executrix of their father’s estate and his subsequent appointment as executor “to investigate her dealings” had “caused a flare-up in [their] relationship.” Moreover, it permitted extensive cross-examination of Brown concerning her removal as executrix and the charges of embezzlement against her. The trial court restricted testimony only involving the “side issue[s]” of whether Brown actually embezzled funds from the estate and whether her share of the estate was ultimately withheld from her: the court ostensibly wanted to avoid debating and relitigating these matters in Lewy’s FELA action.
Thus, the trial court accorded Lewy ample opportunity to demonstrate that he and Brown had a hostile relation
*1299
ship, and that Brown might therefore be inclined to slant her testimony against him.
See Abel,
D. The Trial Court’s Jury Instructions
Finally, Lewy challenges the trial court’s jury instructions, claiming that they were repetitive and unduly emphasized Southern Pacific’s contention that he was guilty of contributory negligence and that any judgment in his favor should therefore be reduced. We disagree.
We have recently stated that “[s]o long as [jury] instructions fairly and adequately cover the issues presented, the judge’s formulation of those instructions or choice of language is a matter of discretion.”
United States v. Echeverry,
Lewy contends that because the challenged instruction immediately followed an instruction discussing contributory negligence, the jury would logically interpret it as referring primarily to him.
*1308
However, the preceding instruction also mentioned the possibility that the jury could find Southern Pacific negligent. As a result, we conclude that the jury logically would have interpreted the challenged instruction to refer to
both
parties. Based upon our review of the instructions as a whole, we conclude that they were not “ ‘misleading or ... inadequate to guide the jury’s deliberations,’ ”
Shortt Accountancy,
CONCLUSION
We conclude that the RLA precluded Lewy from recovering damages based upon his discharge in his FELA action. As a result, we conclude that the trial judge properly excluded Lewy’s evidence relating to his discharge. We also conclude that the trial judge did not abuse his discretion either in limiting the presentation of evidence relating to Jere Brown’s bias or in instructing the jury as he did. We therefore affirm the judgment of the district court.
AFFIRMED.
Notes
. Because we conclude that the RLA precluded the district court from awarding Lewy damages resulting from his discharge, see Analysis, Section B-3, infra, we need not review the trial judge's ruling excluding evidence relating to Lewy’s discharge under Rule 403. This evidence was simply not relevant in Lewy’s FELA action, and therefore should have been excluded under Federal Rule of Evidence 402. See Fed. R.Evid. 402.
. The instructiоn on contributory negligence that immediately preceded the challenged instruction was as follows:
Section 3 of the Federal Employer’s [sic] Liability Act provides [that] ... the fact that [an injured] employee may have been guilty of contributory negligence shall not bar a recovery but the damages shall be diminished by the jury in proportion to the amount of negligence attributable to such employee. So if you should find from a preponderance of the evidence in this case that the defendant was guilty of negligence which caused in whole or in part any injury or damage to the plaintiff, and if you should further find from a preponderance of the evidence in the case that the plaintiff, himself, was guilty of some contributory negligence which contributed toward bringing about all or part of his own injury, then the total award of damages to the plaintiff must be reduced by an amount equal to the percentage of fault or contributory negligence chargeable to the plaintiff.
. The parties originally did not raise the issue of whether the RLA bars Lewy’s claim for discharge-related damages in this appeal. However, as noted above, Southern Pacific raised the issue in a pretrial motion at the district court. Because it relates to whether the district court could exercise subject-matter jurisdiction over Lewy’s claim,
see Crusos v. United Transportation Union, Local 1201,
. Given our conclusion that the evidence Lewy sought to introduce relating to his discharge was not relevant in his FELA action, Rule 403 would technically not apply to that evidence. Rule 403 provides a basis for excluding “relevant” evidence. See Fed.R.Evid. 403. Rule 402 provides the proper mechanism for excluding evidence that is not relevant to the issues in a given action. See Fed.R.Evid. 402.
. In
Beanland
v.
Chicago, Rock Island and Pacific Railroad Co.,
While we agree with the result reached by the Eighth Circuit in Beanland, we question its analysis on two grounds. First, as noted in the text, supra, we do not agree that the FELA section l’s reference to "negligence" can be read so restrictively as to exclude all intentional torts from the provision’s coverage. Second, the Eighth Circuit’s opinion in Beanland does not address the preclusive effect of the RLA, which we consider critical in determining the scope of the FELA’s coverage.
. We note that the Supreme Court has recently granted certiorari in
Buell, see
— U.S. -,
. The sole exception appears to be the Second Circuit’s decision in
Sharkey v. Penn Central Transportation Co.,
. The Supreme Court’s decision in
Farmer v. United Brotherhood of Carpenters & Joiners of America, Local 25,
. For example, if a physician negligently aggravates an injury while attempting to provide treatment, the tortfeasor who originally caused the injury may be held liable for that aggravation.
See Sharkey,
. The majority in Sharkey stated this principle by negative implication:
Assuming the jury ... found that the discharge and its aggravating effect was [sic] reasonably foreseeable — and this issue would first have to be resolved — [we] fail to perceive any logical basis for permitting recovery for its aggravating effect unless the discharge was improper and not the result of wrongful conduct on Sharkey’s part.
. The Supreme Court has defined bias as "the relationship between a party and a witness which might lead the witness to slant, unconsciously or otherwise, his testimony in favor or against a party. Bias may be induced by a witness’ like, dislike, or fear of a party, or by the witness' self-interest.”
United States
v.
Abel,
.
United States v. Harvey,
. Lewy’s counsel maintained both at trial and in his original appellate brief that he sought to introduce testimony concerning the embezzlement charges against Brown solely to demonstrate her bias. As we have noted, Lewy was permitted to introduce sufficient testimony at trial to establish that Brown may have been biased against him.
However, in Lewy’s reply brief, he contends for the first time that the testimony relating to Brown’s alleged embezzlement should have been permitted on the ground that it related to the issuе of Brown’s credibility. This contention is meritless. Federal Rule of Evidence 608(b) prohibits the use of extrinsic evidence to prove specific instances of conduct on the part of a witness that are intended to undermine her credibility. Fed.R.Evid. 608(b);
see Abel,
