H1b extension after i94 expiry

Hi. My husband’s i140 is in process with pp. At the same time we applied h1b extn pp after our i94 expired. His max out is over but we where staying outside US for few months. So all that gave some time for us to apply for extension. Now he has got RFE for h1b ext. we don’t know what the Rfe is. He has only 2 weeks time to stay in US.

My question is are there any chances for his extn to get approved ? If denied then his i140 also be denied ?