Travel to India while H4 extension pending?

[ARK522]

Hi,
I recently got my H-1 extended through my employer. We filed for my wife's H4 separately online and have just the notice (pdf version). It has been almost 5 months now and still pending.

1. She has to travel to India for family reasons. Can she travel with that notice? If she gets her stamping done there, can she return to USA?
2. Will her pending I-539 be cancelled here?
3. What happens if her I-539 gets approved while she's in India and USCIS calls her for biometrics?

Thanks.

 

[newacct]

1. She does not need any notice to travel. The I-539 will be automatically abandoned when she leaves the US. If she gets a visa, she can return to the US.
2. yes
3. Nothing. The I-539 becomes irrelevant when she leaves the US. She will be entering the US on the basis of her visa.