Well lilac first of all, thank you for the update....I remember it well.
She has had a tough time and clearly there still is a leakage of air which has been removed.
Now ...will she need another operation? Well that depends upon the amount of air left in the chest and if that amount of air increases in volume.
If the amount left is of moderate to small volume, then it may well absorb without further surgical procedure, but if it is more than a moderate amount and it gets larger over time, then of course it will need resealing.
Her clinical condition and the appearance of further check X-Rays will determine further management.
Keep me informed.