If your L-1A is denied and not just the change of status, then we have to look at the reason for denial. Typically L-1A is denied if the government feels that you don't rise to the level of an executive or managerial employee for whatever reason, whether it is on the foreign country side or the US side. If you don't rise to that level government can deny your L-1A and if they are denying the L-1A on that basis and your EB-1C I-140 was approved also with the same or similar job description, then obviously there is a potential impact because the criteria used for determining your eligibility for L-1A and EB-1C are the same as far as qualifying as a manager is concerned.
So indirectly because you are using the same job description you could have a problem with the L-1A denial. Yet now, if it is a change of status which can happen because you file your application two days late then the green card I-140 remains unaffected but then you have to worry about the unlawful presence problem. If you have been unlawfully present for 180 days you cannot come back for 3 years, except with a 212(d)(3) waiver and that's always a possibility in cases like these. More...
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