Register

Breaking Down Sudden Stoppage Inspections

Here’s what to do when a propeller strike occurs.

One horrible sound that is legendary among aviators is the unmistakable thwack of a propeller striking something substantial. [Courtesy: Richard Scarbrough]
Gemini Sparkle

Key Takeaways:

  • A propeller strike is a serious event, broadly defined by OEMs to include any incident requiring propeller repair beyond minor dressing, or any operational impact causing RPM loss or contact with an object, even yielding ones like water or tall grass.
  • Even without visible propeller damage, a sudden stoppage can cause severe hidden internal damage to critical engine components such as crankshafts, crankcases, or gear teeth, which can lead to engine failure if not thoroughly inspected and addressed.
  • A comprehensive engine teardown and inspection, adhering to manufacturer service bulletins and often including mandatory replacement of related accessories (like vacuum pumps and magnetos), is crucial for safety and can also uncover other developing engine issues.
See a mistake? Contact us.

There comes a time in most every pilot’s career when they think to themselves, “That doesn’t sound good!” Some sounds are worse than others, and more than a few are absolutely dreadful. One such sound is legendary among aviators. That is the unmistakable thwack of your propeller striking something substantial. Once heard, you enter the world of the sudden stoppage inspection. Buckle up because it will get worse before it gets better.

As many of you know, I owned and operated an aircraft engine shop for more than a decade and consistently handled sudden stoppage inspection cases. The jobs were so common that we even had T-shirts printed with the phrase, “Things get hot when the big fan stops.” Sometimes, humor can help take some of the sting away. Like the late Jimmy Buffet sang, “…if we couldn’t laugh, we would all go insane.” Aircraft ownership and maintenance will do that to you. This is why we all gather here to swap stories, support each other, and maybe learn a little something along the way.

Richard Scarbrough

Richard is a US Navy Veteran, A&P Mechanic, and Embry-Riddle Aeronautical University alumni. His experience ranges from general and corporate aviation to helicopters, business jets, and commercial airliners. Former owner of a 145 repair station, he currently has an aerospace product management role and is a member of the T-C-Alliance. Follow him on X (Twitter) at @RScarCo.

Ready to Sell Your Aircraft?

List your airplane on AircraftForSale.com and reach qualified buyers.

List Your Aircraft
AircraftForSale Logo | FLYING Logo
Pilot in aircraft
Sign-up for newsletters & special offers!

Get the latest stories & special offers delivered directly to your inbox.

SUBSCRIBE