Part 43 Series — Major Repairs, Major Alterations & Form 337: When Maintenance Gets Serious
Changing oil? That’s preventive maintenance.
Replacing a landing light? Still preventive maintenance.
Installing a brand-new GPS navigator with structural panel changes and wiring modifications?
Now we’re in different territory.
Under FAR Part 43, not all maintenance is created equal. Some work is considered major repairs or major alterations, and once you cross that line, additional rules, app...
Part 43 Series — What Really Happens During an Annual? Appendix D Explained
Every year, your airplane disappears into the maintenance hangar for its annual inspection.
A few days (or weeks) later, you get the call.
Sometimes it’s:“Everything looks great.”
Other times it’s:“We need to talk…”
But what exactly is the mechanic required to inspect during that annual? Is it just a quick once-over? A glorified oil change? Or something far more detailed?
The answer lives in FA...
Part 43 Series — Maintenance Records & Performance Rules: If It’s Not Logged, It Didn’t Happen
You changed the oil.You replaced the spark plugs.The airplane runs beautifully.
But here’s the uncomfortable question:
Did you log it correctly?
Under FAR Part 43, maintenance isn’t just about turning wrenches — it’s about how the work is performed and how it is documented. In aviation, the logbook is more than a notebook. It’s a legal record. It determines whether an aircraft is airworthy, whe...
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