The FDNY lieutenant who died in a military helicopter crash was on his final tour of duty, heartbroken colleagues told The Post on Friday.

Fallen firefighter Christopher Raguso announced “it was his last hurrah” at a surprise January sendoff, said Commissioner Pat Fazio of the Commack FD, where the fallen hero served as a volunteer.

“He was ready for it to be the last one,” Fazio said. “All he wanted to do was come home in May.”

Raguso, of Commack, leaves behind a wife, Carmella, and two daughters, ages 5 and 6.

Raguso and fellow Bravest Fire Marshal Christopher “Tripp” Zanetis were among seven US service members killed when their Pave Hawk chopper hit a power line and went down Thursday in western Iraq, near the Syrian border.

Raguso, who turned 39 just two days ago, was on military leave from the FDNY, while Zanetis, 37, was on leave to pursue a career in law.

“[Raguso] tried to make this world a better place,” Fazio said. “He did it the best, and he lost his life doing it.”