Bought a $12 outlet watt meter once just to check if my fridge was dying, ended up finding out my whole apartment circuit was wired wrong. Landlord was not happy about that one.

Wait, 12 years on the line and he only tastes once? That seems wild to me because I always thought you had to check again after adding anything. The second guess thing makes sense though, since messing with a dish you already nailed is how you mess it up. Maybe the real trick is just trusting your gut after enough reps.

Old sheets are great for context but the current manual is what the plane gets signed off against, so mixing them is how you end up with a torque cal that nobody can defend in an audit. The fix is getting engineering to put a note in the maintenance log explaining why the number changed, not just keeping a personal copy of a 1974 page. Knowing the history is smart, but the approved data is still the approved data.