What was found
ODOR IN CABIN AND COCKPIT AFTER TAKEOFF, SOUCE UNKNOWN, ODOR OF SOMETHING BURNING, MAYBE OIL. HIGHEST ALT PATTERN, ALT AND RTN APA. INSPECTED PNEUMATIC DISTRIBUTION BLEED AIR DUCTS IN TAILCONE, SERVICED NR 2 ENGINE OIL TO CORRECT LEVEL, CONDUCTED ENVIRONMENTAL SYS OPS CHECK. NO ODOR PRESENT IN COCKPIT AT THIS TIME. SUSPECT OIL VAPOR ODOR DUE TO NR 2 ENGINE OIL SEVICED AT MAX LEVEL. MX IAW MM 21-00-00, 12-11-02, & 36-11-00.