▁provide ▁proof ▁that ▁this ▁particular ▁application ▁of ▁the ▁senior ity ▁system ▁should ▁prev ail , ▁and ▁that , ▁once ▁the ▁def endant ▁showed ▁that ▁the ▁accommod ation ▁viol ated ▁the ▁senior ity ▁system , ▁it ▁fell ▁to ▁Bar nett ▁to ▁show ▁it ▁was ▁never theless ▁reasonable . ▁ ▁In ▁this ▁case , ▁Bar nett ▁was ▁a ▁US ▁Air ways ▁employee ▁who ▁injured ▁his ▁back , ▁rendering ▁him ▁phys ically ▁unable ▁to ▁perform ▁his ▁cargo - hand ling ▁job . ▁ ▁Inv oking ▁senior ity , ▁he ▁transferred ▁to ▁a ▁less - dem and ing ▁mail room ▁job , ▁but ▁this ▁position ▁later ▁became ▁open ▁to ▁senior ity - based ▁b idd ing ▁and ▁was ▁bid ▁on ▁by ▁more ▁senior ▁employees . ▁ ▁Bar nett ▁requested ▁the ▁accommod ation ▁of ▁being ▁allowed ▁to ▁stay ▁on ▁in ▁the ▁less - dem and ing ▁mail room ▁job . ▁ ▁US ▁Air ways ▁denied ▁his ▁request , ▁and ▁he ▁lost ▁his ▁job . ▁ ▁The ▁Supreme ▁Court ▁decision ▁invalid ated ▁both ▁the ▁approach ▁of ▁the ▁district ▁court , ▁which ▁found ▁that ▁the ▁mere ▁presence ▁and ▁importance ▁of ▁the ▁senior ity ▁system ▁was ▁enough ▁to ▁war rant ▁a ▁summary ▁judgment ▁in ▁favor ▁of ▁US ▁Air ways , ▁as ▁well ▁as ▁the ▁circuit ▁court ' s ▁approach ▁that ▁interpreted ▁' reason able ▁accommod ation ' ▁as ▁' effect ive ▁accommod ation .' ▁ ▁Access ▁Now ▁v . ▁South west ▁Airlines ▁ ▁Access ▁Now ▁v . ▁South west ▁Airlines ▁was ▁a ▁case ▁where ▁the ▁District ▁Court ▁decided ▁that ▁the ▁website