German transit visa with expired H1B

[patil]

Hi,

My wife will be travelling to India from Chicago to Mumbai via Frankfurt by Air India. The airline halts in Frankfurt for refuelling.

My wife is Indian citizen and is working in US on H1B. Her H1B visa has expired in the passport but her I-94 is valid. Please let me know if anyone knows of any requirements that a person in this situation must have German transit visa.

Thanks.