Error Returning REF CURSOR

Question

I'm trying to return a REF CURSOR from a function and get the following error:
ORA-00932: inconsistent datatypes: expected CURSER got NUMBER
ORA-06512: at "CERTS.JIMMY", line 17
ORA-06512: at line 10
Here is my function:
CREATE OR REPLACE PACKAGE jimmy
AS
TYPE refc IS REF CURSOR
RETURN equipment%rowtype;
FUNCTION getresults(p_ssan_in IN equipment.ssan%TYPE,
                         p_type_in IN equipment.equip_type%TYPE)
     RETURN refc;
END jimmy;
CREATE OR REPLACE PACKAGE BODY jimmy
AS
FUNCTION getresults( p_ssan_in IN equipment.ssan%TYPE,
                              p_type_in IN equipment.equip_type%TYPE)
RETURN refc
IS
l_cursor refc;
isretired equipment.retired%TYPE := 'N';
qry varchar2(100) := 'SELECT * ' ||
                              'FROM equipment ' ||
                              'WHERE ssan = :b1 ' ||
                              'AND equip_type = :b2 ' ||
                              'AND retired = :b3';
BEGIN
EXECUTE IMMEDIATE qry
     INTO l_cursor
     USING p_ssan_in, p_type_in, isretired;
RETURN l_cursor;
END getresults;
END jimmy;
The data types for the parameters are all varchar2. I don't know why it says it is returning a number.

Answer 1

I tried your suggestion:
BEGIN
OPEN l_cursor
     FOR qry
     USING p_ssan_in, p_type_in, isretired;
RETURN l_cursor;
END getresults;
But I get an error:
PLS-00455: cursor 'L_CURSOR' cannot be used in dynamic SQL OPEN statement