CARLOS HARRISON Herald Staff Writer

Twenty Cuban-American state and local politicians called Monday on the United States to release Orlando Bosch from custody, drop all charges against him and allow him to stay in this country. Bosch , who spent 11 years in prison in Venezuela but was never convicted in the 1976 bombing of a Cuban passenger jet, returned illegally to the United States last week.

He was taken into custody immediately for having left South Florida in 1974, violating his parole on a 1968 weapons conviction. He remains in custody at the Metropolitan Correctional Center pending a parole revocation hearing and faces possible deportation for entering the United States illegally.

In separate letters to the Washington offices of the U.S. Parole Commission and the Immigration and Naturalization Service, the 20 officials said that Bosch had suffered enough during his 11 years in a Venezuelan prison and asked that he not be treated as an "excludable alien" subject to deportation.

"Dr. Bosch is a valiant freedom fighter who would be again unjustly treated for his strong anti-Communist views if he were deported," the officials wrote to INS. "We implore you to give fair treatment to Dr. Orlando Bosch and, specifically, not to treat Dr. Bosch as an excludable alien."

The officials asked the Parole Commission to release Bosch immediately, hold a parole revocation hearing sooner than the scheduled date in late March and decide the matter quickly.

Furthermore, the officials asked "that the commission not revoke parole or impose any period of imprisonment in connection with parole revocation, in light of his already having suffered 11 years imprisonment without being convicted."

The 20 officials signing the letters are state Sen. Ileana Ros-Lehtinen; state Reps. Roberto Casas, Lincoln Diaz-Balart, Rudolfo "Rudy" Garcia, Arnhilda Gonzalez-Quevedo, Alberto Gutman, Luis Morse and Xavier Souto; Miami City Commissioner Victor De Yurre; Hialeah Mayor Raul Martinez; Hialeah City Council members Andres Mejides, Julio Martinez and Natacha Seijas Millan; West Miami Mayor Pedro Reboredo; Sweetwater Mayor Isidoro Cuevas; and Sweetwater council members Tony Duran, Irain Gonzalez, Jose Montiel, Jose Rivero and Hugo P. Alvarez.