PARIS — As international authorities strive to harmonize a myriad of rules for carry-on flight luggage, a Russian-American jazz musician is nursing a broken arm he said he suffered in a struggle with French airport police over his right to board with a prized trumpet.

The musician, Valery Ponomarev, 63, a former member of Art Blakey’s Jazz Messengers, was preparing to board an Air India flight on Sept. 9 from Paris to New York City, where he lives, when a routine airport ritual erupted into a fierce dispute over his 1961 Connstellation trumpet.

“If you’ve ever played a musical instrument, then you should know how strong the bond is between the musician and the instrument,” Mr. Ponomarev said. “You wouldn’t give your baby away to anybody, and so you wouldn’t give away your horn.”

In his case, the ties were so powerful that he simply would not let go of his trumpet case, which also contained a fluegelhorn.