Helicopter tours would be banned in the five boroughs under a controversial bill re-introduced to City Council in the wake of last month’s deadly East River crash, chopper proponents said Monday.

Brooklyn Councilman Carlos Menchaca’s legislation — which was introduced three years ago and voted down — would prohibit sightseeing helicopters from taking off and landing at heliports owned by the city if they break “stage 3 noise limits.” And industry insiders say there’s no way for tour choppers to meet those noise requirements — and are pleading with lawmakers not to pass the bill.

“As more information about last month’s fatal helicopter crash comes to light, it seems City Council members are once again considering legislating an entire industry out of existence,” Sam Goldstein, deputy director of the Helicopter Tourism and Jobs Council, wrote in a letter to City Council on Monday, five days after the bill was introduced.

In the letter, Goldstein argues that city-based helicopter tours are well-regulated. Banning them would deprive New Yorkers of jobs and tourists of sight-seeing fun, he says.

“Though it was a horrific event that may have been prevented, conflating the well-regulated NYC-based air tour industry with the ‘adventure charter’ operation that went down is a disservice to the people of New York,” Goldstein said, referring to the crash that killed five sightseers.

On March 11, a “doors off” flight operated by the The Kearny, NJ-based firm FlyNYON plunged into the river. Its passengers were strapped into the chopper, owned by affiliated company Liberty Helicopter, with harnesses that they couldn’t get out of. The pilot, who was wearing a regular seat belt, survived.

Menchaca introduced the bill along with Manhattan Councilwomen Helen Rosenthal and Margaret Chin, who said the Big Apple’s helicopter tour business has long been dangerous.

“Even before last month’s fatal crash, we have been fighting to hold the tourist helicopter industry to its promise to keep every resident and visitor to our city safe, as well as preserve the quality of life in our neighborhoods,” the council members said in a joint statement.

“Despite an agreement made with the city, the industry continues to break these rules with impunity by flying outside of their approved flight paths, and by downplaying legitimate complaints about noise and air quality. That is why we reintroduced legislation that would limit the use of the noisiest and dirtiest helicopters, and why we remain committed to protecting our residents and visitors from an industry that thinks it is above the law, or following the rules.”

In 2015, Menchaca first drafted a bill to ban the chopper tour industry — which studies have shown adds more than $30 million a year to the Big Apple’s economy — but it failed to pass.

The next year, the city cut the number of tourist chopper flights allowed to take off in half after complaints from Manhattan residents.