Time Machine Disk Problem

[Acer]

I have a Time Machine hard drive attached via an Airport base station. I've had a couple instances over the last couple years where that drive picked up corruption, but Disk Utility manages to bring it back. It's been about six months since the last flakeout. I think it may stem from an interruption in the network (power flicker or other disturbance in the ethernet force) during a write sequence.