Old timer at Piedmont told me to never bypass the ground straps on the APU
Back when I was still green at the hangar in Charlotte, got a rush job on a 737 APU swap and I was about to skip checking those ground straps to save 20 minutes. This old mechanic, Dave, yanked me aside and said "you skip that step and you'll be pulling that APU back out within three months." Sure enough, six months later a different crew skipped that exact step on the same fleet and that plane came back with generator surges that fried two control modules. Cost the company close to 12 grand in parts and labor. Any of you guys ever seen a shortcut like that blow up way worse than anyone expected?