Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_23117 ( "Fleet #" text, "Year" real, "Manufacture" text, "Model" text, "Length (ft)" real, "Engine" text, "Transmission" text )

### Question ###
What year had an Allison B400R transmission and a model of BRT?

### Accurate SQL ###

SELECT "Year" FROM table_23117 WHERE "Transmission" = 'Allison B400R' AND "Model" = 'BRT'