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_name_48 (people_on_board INTEGER, airline VARCHAR, aircraft_type VARCHAR)

### Question ###
What is the number of people on board at Iberia Airline, with the aircraft type of lockheed l-1049g?

### Accurate SQL ###

SELECT AVG(people_on_board) FROM table_name_48 WHERE airline = "iberia" AND aircraft_type = "lockheed l-1049g"